Fable-5 Agent and Subagent Research Tasks and How to Evaluate Them
Root-session reconstruction, eleven descendant transcripts, nine fork manifests, and eight timestamped screen captures.
§0 · Summary
Tracing agentic AI processes, especially with all the new models rolling out, is incredibly valuable, and it can be easy. You can find out what's working in your agentic system as well as what's not. As an example, I've included an analysis of a fable-5 research process below. I was studying an agent that made a leap to a very good research finding, and then, ultimately, in combination with a cast of other agents crashed my linux machine. Prior to the example though, here are the basics I'm using for doing my own agentic tracing and analysis evaluations.
- Find where your agent transcripts are stored on your syustem. For me it looked like ~/.claude/projects/.... and so on.
- I used codex --yolo to find my transcripts. Once I had the base directory. I described what had happened, and gave it a timestamp. It narrowed me down to a set of folders from there.
- Once you have your transcripts, you can feed them to an LLM and start asking process questions.
- One warning, some transcripts include tool results, and therefore are huge, at least when compared to a given LLM's context.
- One solution, prompt your LLM to explore the process using Python to read through the json data structures and to be sure not return unneeded results. For example, I didn't need to know about Hobson's wedding. I needed to know about how many subagents were forked off and when and how.
- When you have enough interesting answers to move onto the next step, ask the same LLM to dump out your findings in your favorite format, (either .html or .md for me.)
- If you have many, many transcripts, (you know, like when your agent kicks off five more agents), analyse and summarize them one at a time. Then, in a new LLM session, pass in the next transcript and the current running output summary. This keeps you from slogging huge contexts back and forth within the same session.
Direct parsing now establishes that session 28797a95-fc9a-450c-a3e8-bec3d7af2cd0 is the root Claude Code session for the represented family. It directly launched five asynchronous depth-1 children over 101.098 seconds: J at 10:46:24.339, B at 10:46:50.338, A at 10:47:18.708, F at 10:47:50.549, and C at 10:48:05.421. C then independently invoked the deep-research skill and created G, E, K, I, H, and later D.
The root transcript contains 191 records, 824,502 bytes, 24 model requests, and 26 fully matched tool calls (14 Bash, 5 Agent, 4 Read, 2 Write, 1 ScheduleWakeup). Its final model request at 11:02:19 carried 128,067 input tokens and ended normally. The root was therefore a large, long-lived context and a plausible cumulative-memory contributor, but it shows no parent-level API stall, unresolved tool call, or abnormal termination in its own active turns.
New concurrency proof. Claude Code's own pendingBackgroundAgentCount reports 8 at 10:49:16, then 10 at 10:50:12 and 10:51:23. Including the root, this directly establishes an eleven-context session family at peak—not merely a topology-derived lower bound. Later values fall exactly as known workers finish: 9 at 10:54:52, 7 at 10:57:02, and 4 at 11:02:21.
Parent chronology. The root loaded two substantial reference records before launch, generated 25,517 characters of child prompts, scheduled a fallback wakeup for 11:15, and then waited for completions. J and F were direct children, so their full results became model-visible notifications and were archived to scratchpad files. Nested child completions appeared in the root JSONL as queue bookkeeping, while C received and processed their actual notifications. At 11:02:21 the count of four pending agents matches A, B, C, and C's still-live child E.
The root's last assistant record is a clean waiting statement at 11:02:19.339. Its final transcript record at 11:09:05.274 is only removal of E's nested completion notification from the global queue; no root model turn follows. The root therefore adds strong topology and lifecycle evidence but does not move the terminal bound. A, B, C, and D still make the final active writes from 11:09:56.308 through 11:10:04.921.
New direct host evidence. A Windows Task Manager capture at 11:06:18 shows 14.8/15.2 GB physical memory in use (97%), 100% NVMe active time, and 390 MB/s reads with negligible network traffic. At 11:09:48, disk active time is still 100%, but memory has fallen to 12.9/15.2 GB (85%). Severe host memory/storage pressure is therefore established rather than merely operator-supplied; however, the physical-memory curve was not a simple monotonic climb to zero headroom. The drop may represent paging/reclaim, garbage collection, release of another workload, or some combination. The screenshots do not identify the process generating the disk traffic.
New fleet and terminal evidence. A bg-nitro screen capture at 10:58:34 directly proves at least one additional Claude CLI session was active outside the rust family. A rust-terminal capture at 11:12:31 shows process exited with code 1 (0x00000001). Thus 11:10:04.921 remains the last healthy family record; ≈11:10:15 remains an inferred likely cessation bound, while 11:12:31 is now the hard observed process-exit upper bound. Exit code 1 is generic and does not itself prove a Linux OOM kill.
The best-fit explanation is now more specifically severe memory pressure with sustained storage thrash, followed by a process failure. OOM remains the leading mechanism because it fits the host telemetry, aggregate contexts, WSL cap, and abrupt multi-stream silence, but the evidence does not distinguish an in-guest OOM kill, Node/Claude internal failure under memory pressure, WSL-level instability, or another process crash. The earlier completed-context-retention hypothesis is also less certain: the 1.9 GB host-memory decrease between the two Task Manager captures spans E's completion, but no attribution is possible.
§1 · Provenance & method
This revision parses the supplied root transcript 28797a95-fc9a-450c-a3e8-bec3d7af2cd0(1).jsonl directly and integrates it with the v1.11 report. Scripted checks covered JSON validity, record types, timestamp conversion, unique model requests, tool-use/result pairing, tool mix, launch-call identity, launch prompts, queue operations, pendingBackgroundAgentCount, record sizes, embedded-image bytes, final-request token accounting, direct-versus-nested completion delivery, and the root's terminal state.
The root file contains 191 valid JSON records totalling 824,502 B. All 26 tool calls have matching results; two short Bash calls returned handled errors. The largest new byte payload is a queued-nudge image containing 72,488 base64 characters—material but far smaller than Agent A's two roughly 680 K-character image results. Historical passenger and voyage findings were not imported except where a task description or result-routing fact was necessary to reconstruct process behavior.
The existing eleven descendant transcripts and nine fork manifests remain the evidence base for child runtimes, completion states, token counts, and topology. This revision additionally examines eight PNG captures whose filenames encode capture times from 10:49:29 through 11:12:31. A capture timestamp dates the screenshot, not necessarily every line visible inside it: terminal output can predate capture, manager rows can be stale, and the tmux clock can freeze after process exit. Task Manager values are direct point-in-time observations, while causal attribution of memory or disk activity remains inferred.
Three epistemic grades remain in use: established (direct transcript, manifest, or screen observation), operator-supplied (host architecture not independently measured here), and inferred (best explanation subject to §11 tests).
§1A · Fork-manifest validation
The manifests provide a compact, auditable mapping from each attached agent file to the exact task-launch call that created it. The role descriptions agree with the v1.10 assignments without contradiction.
Root-transcript corroboration. The five depth-1 launch calls and their toolUseId values appear directly in the root transcript and match J, B, A, F, and C. This supplies the missing direct launch evidence for C even though no C manifest was attached. The root does not launch G/E/K/I/H/D; their ancestry remains directly established in C and the depth-2 manifests.
| agent | manifest description | depth | parent field | launch toolUseId |
|---|---|---|---|---|
| a855ec32728138338 (J) | Heymann / Hobson / Honeyman | 1 | omitted | toolu_017irRGCMjVVp4nT5TmG3yEH |
| aa0360d207cb6f145 (B) | Howe / Howley / Hoyt / Hrachovina / Hudgins | 1 | omitted | toolu_01RRaJFYG2myNFzeXDzArV1P |
| a5dbd91269fe4e878 (A) | Hudson / Hull / Hunnewell / Ivancovich / Johnson | 1 | omitted | toolu_012zMGMY7si8s5WkgiPAenev |
| ae58ff585d384f484 (F) | Kahn / Kingsland / Kline / Kountze / Kuhn | 1 | omitted | toolu_01WLfnhyXxFAi1eB2qRBKCw7 |
| a76ca0f658a6b932d (G) | Tom Slick 1937 trip | 2 | adb5ce21a4c09bafd | toolu_01CqYaQyFUZqJZKyMgQA19b9 |
| ae006849bcbdbe48b (E) | Normandie Sept 1937 crossing | 2 | adb5ce21a4c09bafd | toolu_012NpYYPsaUrsix3Mp2i64tp |
| a9b7697419d80c685 (K) | late-Sept 1937 context | 2 | adb5ce21a4c09bafd | toolu_01U4vPCk2pSPMueaYs4k9zS1 |
| a918aa7aa38c2c90a (I) | Loch Ness craze 1937 | 2 | adb5ce21a4c09bafd | toolu_01SXkUhdiVhCvs9fLTroLBj5 |
| a91700e439d6ea3c2 (H) | Astor Room / 1937 intelligence travel | 2 | adb5ce21a4c09bafd | toolu_01PLjZZVenFDvtDWZttUaaYF |
Launch-wave crosswalk
| time | agent / evidence | topological significance |
|---|---|---|
| 10:46:24.357 | J starts; attached manifest says depth 1. | First represented direct child of the root family. |
| 10:46:50 | B starts; attached manifest says depth 1. | Second concurrent row worker. |
| 10:47:19 | A starts; attached manifest says depth 1. | Third concurrent row worker. |
| 10:47:50.558 | F starts; attached manifest says depth 1. | Fourth concurrent row worker. |
| 10:48:05 | C starts; root transcript directly records launch toolu_013r4Z4D98QNNh6G2YfiwEQm returning adb5ce21a4c09bafd. No C manifest was supplied. | Fifth top-level sidechain; future parent of the research fan-out. |
| 10:48:49.091 | G starts; depth 2, explicit parent C. | C child 1. |
| 10:49:02.107 | E starts; depth 2, explicit parent C. | C child 2. |
| 10:49:12.005 | K starts; depth 2, explicit parent C. | C child 3. |
| 10:49:21.283 | I starts; depth 2, explicit parent C. | C child 4. |
| 10:49:34.748 | H starts; depth 2, explicit parent C. | C child 5; represented family reaches ≥11 live contexts (root + five depth-1 sidechains + five depth-2 children). |
| 11:09:55.545 | D starts from C's verifier launch; transcript-established. No D manifest was supplied. | Late sixth C child, allocated after the five search children had completed. |
Inference boundary. A distinct toolUseId proves a distinct launch call, not a distinct operating-system process. Likewise, spawnDepth establishes task ancestry, not whether completed task state was freed. The manifests strengthen the family tree and the minimum allocation count, but process co-residency and memory retention still require Claude Code implementation evidence or host telemetry.
§2 · Host & fleet context (operator-supplied architecture; directly observed pressure)
Cooper95 is a 16 GB Windows machine running WSL2 with the guest capped at 8 GB RAM + 8 GB swap and autoMemoryReclaim=dropcache. The bg_trav fleet runs multiple Claude CLI “polecat” workers across three tmux sessions; each CLI instance is described by the operator as a Node.js process holding its own conversation state, and each sidechain adds another context within that process. The process/co-residency details remain architectural and operator-supplied.
The pressure itself is now directly observed. At 11:06:18 Windows reports 97% physical-memory use and a saturated NVMe device reading at 390 MB/s. At 11:09:48 it reports 85% memory with the disk still saturated. A separate bg-nitro Claude CLI session is visibly active at 10:58:34. These captures establish a broader fleet and a host under severe memory/I/O pressure; they do not prove which PID owned the memory, whether the I/O was pagefile, WSL swap, file-cache churn, or ordinary reads, or whether all rust sidechains shared one OS process.
§2A · Root session — 28797a95-fc9a-450c-a3e8-bec3d7af2cd0
| role | Gas Town polecat rust; root session for the manifest-page assignment. It divided the page into four row batches and one voyage-context dossier. |
| observed span | 10:43:06.639 – 11:09:05.274 (25 m 58.635 s). Model-active records run 10:43:18.035 – 11:02:19.339; later records are queue metadata. |
| transcript | 191 records · 824,502 B · 24 unique model requests · 26 tool calls · 2 handled tool errors · no unmatched calls |
| tool mix | 14 Bash · 5 Agent · 4 Read · 2 Write · 1 ScheduleWakeup |
| final request | 2 uncached + 568 cache-create + 127,497 cache-read = 128,067 input tokens; 59 output; normal end_turn |
| direct children | J, B, A, F, C; all launch IDs and returned agent IDs match the v1.11 crosswalk |
| terminal state | Clean waiting state. Last assistant text at 11:02:19; four pending agents reported at 11:02:21. The later 11:09:05 record is queue removal for E, not a parent turn. |
Direct launch calls
| time | child | returned agent ID | root launch toolUseId |
|---|---|---|---|
| 10:46:24.339 | J · rows 1–8 | a855ec32728138338 | toolu_017irRGCMjVVp4nT5TmG3yEH |
| 10:46:50.338 | B · rows 9–15 | aa0360d207cb6f145 | toolu_01RRaJFYG2myNFzeXDzArV1P |
| 10:47:18.708 | A · rows 16–21 | a5dbd91269fe4e878 | toolu_012zMGMY7si8s5WkgiPAenev |
| 10:47:50.549 | F · rows 22–30 | ae58ff585d384f484 | toolu_01WLfnhyXxFAi1eB2qRBKCw7 |
| 10:48:05.421 | C · voyage context | adb5ce21a4c09bafd | toolu_013r4Z4D98QNNh6G2YfiwEQm |
Chronology
| time | root-session event | incident significance |
|---|---|---|
| 10:43:06–10:44:25 | Session starts, primes Gas Town context, checks the hook, creates branch test1a_test1, and reads the manifest plus two reference documents. Two reference tool-result records are 43.4 KB and 84.7 KB. | The root begins with a substantial preloaded context before any child exists. |
| 10:45:51 | States: “fanning out five parallel research agents.” | Direct evidence of intended top-level concurrency. |
| 10:46:24.339–10:48:05.421 | Launches J, B, A, F, then C. The five prompts total 25,517 characters. C's broad dossier prompt contains four multi-part research questions but does not explicitly order C to create children. | Confirms the root-to-child edges. C's later subdivision is its own skill-driven choice. |
| 10:49:14.123 | Schedules a fallback wakeup for 11:15:00. | A small persistent control object remains pending; it never fires in the available transcript. |
| 10:49:16–10:51:23 | pendingBackgroundAgentCount rises from 8 to 10 after C finishes its nested fan-out. | Directly establishes eleven simultaneous family contexts including the root. |
| 10:53:30–10:54:52 | K completes; the root logs its nested notification in queue metadata. A later system record reports 9 pending agents. | The counter falls exactly with the known completion. |
| 10:54:31 | A queued administrative nudge arrives with a 72,488-character base64 PNG attachment. | Adds bytes to the root, but is roughly one-tenth the base64 size of either image read by A. |
| 10:55:31–10:57:02 | J, a direct child, completes and its result becomes a model-visible user notification. The root summarizes it, updates the task record, and writes a scratchpad file. I then completes as a nested child; pending count falls to 7. | Shows direct child results are copied into root context, while nested completions are routed through C. |
| 10:58:37–11:00:40 | H and G complete through nested queue paths. F then completes as a direct child; the root ingests its result and archives it. | The root's context grows from completion payloads even as active count falls. |
| 11:02:19–11:02:21 | Root says it is waiting on groups B, A, and C; normal end_turn. System reports 4 pending, matching B, A, C, and E. | Strong consistency check for the global counter and a clean pre-terminal root state. |
| 11:08:59.904–11:09:05.274 | E's completion is enqueued and removed in the root transcript. No root user notification or model request follows because E belongs to C. | Queue processing remained alive immediately before C's verifier phase; this does not establish root generation at 11:09. |
Operational interpretation
The root is best classified as large-context / registry / result-retention-shaped. Its ≈128 K-token final request is the largest directly measured input context in the family, and its JSONL stores direct result payloads plus duplicate enqueue/remove records for several nested completions. Those queue records appear not to have been added wholesale to the root's model prompt—the next cache deltas are small—but equivalent in-memory queue and task objects may still have remained referenced.
The root is not a transcript-visible trigger. It completed every tool call, ended every active turn normally, and was dormant for the final eight minutes. Its importance is architectural: it proves the launch topology, validates the eleven-context peak with an internal counter, and supplies another substantial context and task registry that may have remained resident while A, B, C, E, and later D continued.
The 10:56:06 agent-manager capture visibly retains J's completed row alongside live workers. This establishes that at least task metadata and summary metrics remained registered after completion. It does not establish that J's full prompt, message array, tool results, or request buffers remained strongly referenced; the memory-retention question still requires heap or implementation evidence.
§2B · Timestamped screen-capture evidence
The captures provide three kinds of evidence absent from JSONL: visible live-agent registry state, proof of another concurrent Claude session, and point-in-time Windows host telemetry. They materially strengthen the resource-pressure case while adding two important cautions: physical memory fell between the two Task Manager snapshots, and the eventual terminal surface reported generic exit code 1 rather than a diagnostic OOM code.
Inference retained: cessation probably occurred soon after 11:10:04.921, but ≈11:10:15 is not a directly observed timestamp.
| capture | file | forensic reading |
|---|---|---|
| 10:49:29 | Screenshot 2026-07-11 104929.png | The rust root displays “Waiting for 8 background agents to finish” while the nested fan-out is still building. The capture time is later than the line may have been emitted, so this is a contemporaneous UI witness rather than a precise event timestamp. |
| 10:56:06 | Screenshot 2026-07-11 105606.png | J is announced finished at 9 m 7 s, while the agent manager still lists its 73.4 K-token row together with the other direct workers and a collapsed +4 beneath C. This proves completed-task registry visibility, not retention of the full conversation object. |
| 10:58:34 | Screenshot 2026-07-11 105834.png | A separate tmux session, bg-nitro, is simultaneously running another Claude CLI turn and multiple web searches. The incident therefore occurred amid at least one directly observed out-of-family Claude workload, not only the rust session family. |
| 11:00:09 | Screenshot 2026-07-11 110009.png | The rust agent manager shows B at 83.6 K tokens and thinking, A at 94.8 K, F at 88.9 K, C at 53.7 K, plus two collapsed descendants. The UI independently corroborates several large concurrent contexts around the image-ingestion inflection. |
| 11:04:34 | Screenshot 2026-07-11 110434.png | B is still running the Seattle Star XML shell loop at 94.8 K tokens; A has grown to 110.3 K and is tracing Hunnewell parentage; C remains present with one collapsed descendant. This matches the transcript-derived B transfer phase and A’s growing context. |
| 11:06:18 | Screenshot 2026-07-11 110618.png | Windows Task Manager shows 14.8/15.2 GB physical memory in use (97%), NVMe active time at 100%, 390 MB/s reads, 1.2 MB/s writes, CPU at 35%, and only 16 Kbps of Wi-Fi traffic. The disk graph has been near saturation for roughly the preceding 40–45 seconds. |
| 11:09:48 | Screenshot 2026-07-11 110948.png | Task Manager still shows Disk 0 at 100% active time, but physical memory has fallen to 12.9/15.2 GB (85%); CPU is 28% and current Wi-Fi traffic is zero. Pressure remained severe, but host RAM did not climb monotonically to the terminal event. |
| 11:12:31 | Screenshot 2026-07-11 111231.png | The rust terminal displays “[process exited with code 1 (0x00000001)]”. The stale agent pane still shows B, A, and C-era status rows. This supplies a direct hard upper bound: the terminal process had exited by the capture time; code 1 is generic and does not itself identify OOM. |
§3 · Agent A — a5dbd91269fe4e878 (rows 16–21)
| assignment | Manifest p.18 rows 16–21: Hudson (Syracuse), Hull (NYC), Hunnewell (S. Natick), Ivancovich ×2 (Tucson), Johnson (Evansville) |
| runtime | 10:47:19 – 11:09:56 (22 m 38 s) · 47 API requests · 76 tool calls (30 WebFetch, 24 WebSearch, 19 Bash, 2 Read, 1 ToolSearch) · 1 error result |
| final context | ≈112 K tokens (well within limits — not a context failure) |
| turn latency | median 12.5 s · max 280.7 s |
| terminal state | Two tool calls in flight, never answered: WebFetch …oH5nTWLQ, Bash …2jQGmmA5 |
Chronology
| time | event |
|---|---|
| 10:47–10:53 | Search phase. WebSearch/WebFetch loop on the assigned names; healthy cadence (results 2–10 s). Repeated HTTP 403 walls: wikitree, findagrave, Arizona Historical Society PDF, JSTOR, HathiTrust, grokipedia. |
| 10:53–10:59 | Curl escalation [84]. Routes around 403s via Bash+curl in the session scratchpad. Pulls archive.org texts: hunnewell1.txt 535,584 B [85], harv1902_1917.txt 847,539 B [99]; spoofed-UA scrapes of findagrave pages. ivancovich.pdf turns out to be HTML and pdftotext is absent — the session's only is_error [127]. Disambiguates the Harvard-secretary Hunnewell (b. Boston 1880) from the London-born passenger [101]. |
| 10:59:22 | NARA pivot [162]. Queries the 1950census.archives.gov search API to locate Hunnewell enumeration districts in Massachusetts. |
| 11:00:12 | Image ingestion №1 [173]. Fetches a full-resolution census page via NARA IIIF at width 2000: census1950.jpg, 2000×2306, 1,179,152 B; then Reads it into model context [175] — the tool_result embeds 682,520 base64 chars. Transcript jumps 471,756 → 1,837,703 B in one line. |
| 11:01:11 | Image ingestion №2 [182–185]. natick.jpg, 2000×2351, Read into context: +678,248 base64 chars. Transcript now 3,212,811 B — 6.8× growth in 61 s. Token cost is trivial (≈4.6 K tokens per image); byte cost is not: every subsequent API request serializes a ≥3.2 MB message array. |
| 11:01:37 | Terminal phase begins [189–190]. A wikitree genealogy curl fails to finish in 120 s and is auto-backgrounded as task bciscvn9q [191] (completion notice never arrives; a same-site curl earlier [137→139] took 1.4 s). The parallel WebSearch takes 128 s [190→192] against a 4–10 s baseline. |
| 11:04:19 | Last normal tool result [198]. Then 280.7 s of silence before the next assistant turn begins streaming at 11:09:00 [199] — a 462-output-token response that costs ~10–20 s at this session's observed rates. 22× the median turn latency. |
| 11:09:56.308 | Final record. Response dispatches WebFetch (Hull obituary page) + Bash (archive.org "520 Oak" + 1950-census Helena Johnson/IN). Neither result was ever written. Given in-family latencies of 1–15 s, the executor died within roughly the following minute. |
Not counted as anomalies: turn gaps of 36.2 s [177→178] and 40.2 s [201→202] — both consistent with thinking-heavy generation (2,466 and 2,030 output tokens).
§4 · Agent B — aa0360d207cb6f145 (rows 9–15)
| assignment | Manifest p.18 rows 9–15: Howe (Brookville LI), Howley (Port Chester), Hoyt ×2 (New Canaan), Hrachovina (15 E 72nd St NYC), Hudgins ×2 (Carmel CA) |
| runtime | 10:46:50 – 11:09:57 (23 m 07 s) · 50 API requests · 73 tool calls (31 WebSearch, 11 WebFetch, 30 Bash, 1 ToolSearch) · 2 error results |
| final context | ≈94 K tokens |
| turn latency | median 9.5 s · max 22.3 s — no anomalous API-path latencies at any point |
| terminal state | Final record is a successful tool_result at 11:09:57.071 [195]; the next assistant turn never began. No pending tool calls. |
Chronology
| time | event |
|---|---|
| 10:46:57–10:50 | Search phase. Parallel WebSearch triples; early strong identification of Polly Brooks Howe [23,31]. Same 403 walls as Agent A (findagrave, hathitrust, newyorksocialdiary, cdnc.ucr.edu, loc.gov-via-WebFetch, virginiachronicle). |
| 10:50:39 | Curl escalation [80] — "Let me try curl from the shell for the archives that block WebFetch" [79]. Library of Congress JSON API answers curl; 5 Chronicling-America newspaper hits for the Hudgins line [92]. |
| 10:51–10:55 | Rate-limit combat. Cloudflare "Just a moment…" interstitials [89,102] and an HTTP 429 [98]. The agent names the condition — "Rate-limited. Waiting…" [100] — and adopts sleep/retry loops (sleep 45 [101]; 5-attempt loop with sleep 20 [104]), raising its own Bash timeout parameter as it goes: 120 s → 300 s. |
| 10:56:33 | NARA pivot [125]: 1950-census API for Hudgins/CA and Hoyt/CT [125–131, 148–152]; Monterey ED transcriptions yield only "Higgins" [131]. |
| 10:58–11:01 | OCR-mining setup. archive.org full-text beta probed [159–168]; LOC item JSON for the Poplar Standard (MT, 17 Aug 1939) yields 9 ALTO-XML page URLs on tile.loc.gov [175–181]. |
| 11:01:08 | Bulk loop №1 [182]: downloads 8 page XMLs (pg0765–0772.xml, kept on disk), greps each — "MATCH page 0768" in 68.7 s (≈8.6 s/page). OCR context extracted in-place [184–189]. |
| 11:03:07 | Builds page lists for two more issues — 16 + 4 pages [192→193]. |
| 11:03:20 | Bulk loop №2 (final command) [194], self-set timeout=600000 ms: sequentially downloads all 20 ALTO XMLs (overwriting tmp.xml), greps each, extracts OCR on match. Returns its match snippet after 396.5 s (≈19.8 s/page) at 11:09:57.071 [195] — the file's final record. |
Timeout self-escalation across the session: 120→300→90→120→90→90→90→300→90→90→300→300→400→600 s.Every long gap in Agent B is accounted for by its own commands — literal sleeps, retry loops, and sequential download loops under an explicitly requested timeout. Its API-turn path was clean (max 22.3 s) right up to its last turn at 11:03:20. The 2.3× per-page slowdown between loop №1 and loop №2 is noted but ambiguous: different newspapers, different page sizes, and LOC was actively throttling this client all session.
§5 · Agent F — ae58ff585d384f484 (rows 22–30)
| assignment | Manifest p.18 rows 22–30: Kahn ×2 (Philadelphia), Kingsland (Lenox/Hewlett), Kline ×2 (Jersey City), Kountze ×2 (NYC), Kuhn ×2 (300 Park Avenue) |
| runtime | 10:47:50.558 – 11:00:40.574 (12 m 50.016 s) · 153 records · 473,981 B · 30 unique model requests · 60 tool calls |
| tool mix | 37 WebSearch · 18 WebFetch · 4 Bash · 1 ToolSearch · 0 tool-level error results · no pending calls |
| final context | 89,548 input tokens on the final request (2 uncached + 1,147 cache-create + 88,399 cache-read); 12,901 output tokens |
| turn latency | median 12.723 s; maximum before the final synthesis 25.560 s. Terminal quiet interval 180.558 s, paired with the 12,901-token final answer. |
| terminal state | Clean end_turn. Final 24,715-character answer written at 11:00:40.574; no unresolved command, background task, or child agent. |
| timestamp note | The operator now corrects the external last-written time to approximately 11:00 AM, consistent at minute precision with the embedded final event at 11:00:40.574. The prior 11:09 discrepancy claim is withdrawn. |
Chronology
| time | event |
|---|---|
| 10:47:50.558 | Task record created as a sibling sidechain in the same parent session, cwd, branch, and Claude Code version as A–C. Deferred-tool and skill-list attachments follow within 13 ms. |
| 10:47:59–10:51:24 | Direct search/fetch phase. Selects WebSearch/WebFetch, then repeatedly dispatches two- and three-call search/fetch batches. WebSearch median latency is 5.764 s (max 14.778 s); WebFetch median 3.951 s (max 7.453 s). Five fetches hit HTTP 403, one later hits 404, and several return redirect/CAPTCHA/content walls, but none is recorded as a tool error. |
| 10:51:43–10:52:16 | PDF extraction fallback. A fetched reference PDF exists in the shared tool-results directory at 2,639,508 B. pdftotext is absent, so F checks for Python libraries and uses PyMuPDF twice to extract selected entries. All four Bash calls in the session finish in 0.5–1.9 s; no persistent shell or background process remains. |
| 10:52:30–10:57:39 | Expanded corroboration. Continues bounded search/fetch rounds on identities, institutions, and addresses. Transcript growth is gradual; the largest tool-result payload is 6,461 characters and the largest JSONL record before the final answer is 13,947 B. No image/base64 payload appears. |
| 10:57:39.804 | Last tool result. A normal WebSearch result closes the research phase. Every one of the 60 tool calls has a matching result. |
| 10:57:39.804–11:00:40.574 | Final synthesis. The transcript is quiet for 180.558 s, then records the request header and 12,901-token answer 212 ms apart. Because the answer is large and the recorder evidently flushes it at completion, this interval is generation-shaped rather than an unexplained API-path stall. |
| 11:00:12–11:01:37 | Cross-agent bracket. While F is finishing, A ingests its first full-resolution image at 11:00:12. F still ends normally 28.5 s later. A's second image arrives at 11:01:11, and its first abnormal waits begin at 11:01:37—after F has already completed. |
| ≈11:00 external time | Operator correction. The external last-written observation is approximately 11:00, not 11:09. It is consistent with the embedded end and no longer supplies a separate lifecycle anomaly. |
Operational profile
| measure | value | interpretation |
|---|---|---|
| JSONL size | 473,981 B | Moderate; no discontinuous byte growth and roughly 6.8× smaller than A's image-inflated transcript. |
| Tool-result text | 108,899 chars | Distributed across 60 results; largest result 6,461 characters. |
| Largest record | 26,342 B | The final text record, not an embedded binary payload. |
| Scratch artifact | 2,639,508 B PDF | File-backed and parsed by short-lived Python processes; possible page-cache pressure, not persistent transcript bloat. |
| Nested concurrency | 0 | Leaf worker: no Agent/Task launches, sleeps, retry loops, or asynchronous background command. |
| Completion lead | 9 m 24.347 s | Time from F's clean end to D's final observed record; F is an early-load/retention witness, not a terminal witness. |
| External update time | ≈11:00 | Operator-corrected; consistent with the embedded 11:00:40.574 end at minute precision. |
F is best classified as a normal control and completed-state candidate. It proves the family could complete a substantial ≈89.5 K-input / 12.9 K-output request after A's first image ingestion without visible fleet-wide collapse. Its possible incident contribution is lifecycle-dependent: if completed sibling contexts remained resident in the parent Node process, F may have left a large conversation and result object live for the final nine minutes; if promptly freed, its direct contribution after 11:00:40 should have been small.
§5A · Agent J — a855ec32728138338 (rows 1–8)
| assignment | Manifest p.18 rows 1–8: Heymann ×2 (515 West End Avenue), Hobson ×3 (Beverly MA / E. 54th St NYC), Honeyman ×3 (106 8th Avenue, Brooklyn) |
| runtime | 10:46:24.357 – 10:55:31.229 (9 m 06.872 s) · 127 records · 376,539 B · 27 unique model requests · 45 tool calls |
| tool mix | 33 WebSearch · 11 WebFetch · 1 ToolSearch · 1 explicit error result · no pending calls |
| final context | 73,154 input tokens on the final request (2 uncached + 1,536 cache-create + 71,616 cache-read); 7,631 output tokens |
| turn latency | median 9.963 s; maximum before final synthesis 15.861 s. Terminal interval 111.646 s, paired with the 7,631-token final answer and classed generation-heavy. |
| terminal state | Clean end_turn. Final 16,882-character answer written at 10:55:31.229; every tool call has a matching result. |
| external time | The operator's “last updated at 10:55 AM” observation agrees at minute precision with the embedded end. |
Chronology
| time | event |
|---|---|
| 10:46:24.357 | Task record created as the earliest known manifest-row sibling in parent session 28797a95…, with the same cwd, branch, Claude Code version, and sidechain status as A, B, F, and C. Deferred-tool and skill-list attachments follow within 22 ms. |
| 10:46:29–10:49:34 | Honeyman-focused search/fetch phase. J selects WebSearch/WebFetch and runs bounded paired calls. The sequence remains entirely on the managed web-tool path: no curl, Python, Read, or file-backed fallback. One WebFetch returns an explicit ECONNREFUSED after 1.595 s; the agent immediately continues. |
| 10:49:34–10:51:31 | Hobson-focused phase. Repeated paired searches and short fetches complete with ordinary cadence. At 10:49:34 C launches its fifth search child; J is therefore demonstrably active throughout the represented ≥11-context peak and continues receiving normal results. |
| 10:51:39–10:52:14 | Heymann-focused phase. Search/fetch calls remain bounded. WebSearch median latency for the full run is 5.485 s (maximum 8.189 s); WebFetch median is 2.289 s (maximum 5.848 s). |
| 10:52:25–10:53:39.583 | Cross-check and address/network phase. Final searches revisit addresses and possible cast connections. The last tool result arrives normally at 10:53:39.583. All 45 calls are resolved; no process, child, or notification remains outstanding. |
| 10:53:39.583–10:55:31.229 | Final synthesis. A 111.646-second record-silent interval ends with a 7,631-output-token, 16,882-character answer and normal end_turn. The final request header appears 110.826 s after the last result and the text record follows 0.820 s later, a completion-flush pattern consistent with generation rather than an API-path stall. |
| 10:55:31–11:00:12 | Cross-agent bracket. J completes about 4 m 41 s before A ingests image №1. It is the earliest cleanly completed top-level sibling and may become a retained parent-side conversation/result object before the image-driven byte expansion. |
Operational profile
| measure | value | interpretation |
|---|---|---|
| JSONL size | 376,539 B | Moderate; about 8.5× smaller than A's image-inflated transcript. |
| Tool-result text | 88,460 chars | Spread over 45 results; largest result 3,168 characters. |
| Largest record | 18,401 B | The final text answer, not embedded binary data. |
| Scratch/process footprint | none observed | No Bash, Read, local file, image, subprocess, retry loop, sleep, or background task. |
| Errors | 1 | One fast, explicit connection-refused WebFetch; handled without escalation. |
| Nested concurrency | 0 | Leaf worker: no Agent/Task launches or asynchronous work. |
| Completion lead | 14 m 33.692 s | Time from J's clean end to D's final observed record; J is a peak-concurrency and retention witness, not a terminal witness. |
J is best classified as a clean peak-concurrency control and completed-sibling retention candidate. It adds no unexplained latency, unresolved work, byte-scale payload, or process residue. Its possible contribution is lifecycle-dependent: if the parent retained J's ≈73 K-input conversation and 16.9 K-character result after completion, that state persisted for most of the remaining incident; if promptly released, J's direct post-10:55:31 contribution was modest.
§6 · Agent C — adb5ce21a4c09bafd (voyage-context dossier)
| assignment | Not a row batch. Voyage-context dossier for the crossing itself ("The Gladych Files"): Tom Slick Jr.'s 1937 European trip and return voyage; the S.S. Normandie's late-Sept 1937 westbound specifics (post–Blue-Riband season, notable passengers); the historical moment a returning American had just lived through; any Vincent Astor "Room" / intelligence-adjacent connection. Kickoff mandates URL citations, confidence tags, no fabrication; "Your final message IS the deliverable" [0]. |
| runtime | 10:48:05 – 11:10:02 (21 m 57 s) · 9 API requests · 7 tool calls (1 Skill, 6 Agent) · 0 errors · no web tools of its own |
| role | Pure orchestrator: invokes the deep-research skill [4], whose injected harness [6] prescribes the fan-out (see workflow quote below) |
| fan-out | 6 async sidechain children, all resolved to claude-fable-5: 5 parallel search agents + 1 adversarial verifier. Children's aggregate (5 completed): 360,756 tokens · 207 tool calls · 51.6 min compute in 20.3 min wall (≈2.5× parallelism) |
| final context | ≈62 K tokens; the five result payloads reached C only as task-notification text totalling 71,920 chars |
| turn latency | Notification→ack 4.9–10.4 s throughout; one 48.6 s planning turn at 11:09 (17.2 s to first record + 31.4 s streaming, 1,829 output tokens) — within the thinking-heavy norms established for A. No anomalous API-path latencies, though C was idle 11:00–11:09 and cannot speak to A's dead-air window. |
| terminal state | C stopped at 11:10:02.371 while verifier ade3cea8577a12ebc was active. The verifier is now established to have continued through 11:10:04.921, but no completion notification returned to C. The dossier was never synthesized. |
Scope: Decompose question into 5 search angles · Search: 5 parallel WebSearch agents, one per angle · Fetch: URL-dedup, fetch top 15 sources · Verify: 3-vote adversarial verification per claim · Synthesize: merge, rank by confidence, cite. — deep-research workflow text as injected at [6]
Chronology
| time | event |
|---|---|
| 10:48:05 | Task received from the parent orchestrator [0]; deferred-tools delta and skill listing attach [1–2] (Monitor/SendMessage/TaskStop control primitives available; none ever used). |
| 10:48:20 | Invokes deep-research [4]; harness text injected [6]. |
| 10:48:49–10:49:34 | Fan-out. Five async general-purpose children launched in 45 s [9,11,13,15,17], one per angle (inventory below), each instructed to run "at least 6–10 searches" plus fetches. Each launch ack names an output_file under tasks/ and warns that reading it "will overflow your context." At 10:49:34 the represented session family holds its peak census: ≥11 live contexts (parent + J + A + B + F + C + 5 children). |
| 10:49:46 | "All 5 search agents are running in parallel. I'll wait for their completion notifications before moving to the verify/synthesize phases." [19] |
| 10:53:30 | Child №3, K (late-Sept 1937 context), completes — first notification [20]. Its directly examined transcript shows a clean end_turn at 10:53:30.126 after 12 model requests and 19 resolved tools; C acknowledges it in 5.4 s. |
| 10:56:35 | Child №4 (Loch Ness craze) completes [23]. Ack 4.9 s. |
| 10:58:37 | Child №5 (Astor "Room") completes [25]. Ack 7.1 s. |
| 10:59:54 | Child №1 (Tom Slick) completes [27]. Its directly examined transcript now shows a clean end_turn at 10:59:53.890, followed by C’s notification in the next second. C flags the critical negative-source finding [29]. Four of six family research contexts are then retired; only the Normandie child continues. |
| 11:09:06.8 | Child №2 (Normandie crossing) — last and heaviest: 106,886 tokens, 62 tool calls, 19 m 58 s [30]. The directly examined child transcript now shows a clean end_turn at 11:08:59.682; the parent notification followed about 7.1 s later. Its run brackets the entirety of Agent A's degradation (§9). |
| 11:09:23–11:09:55 | Verify-planning turn [31–33], C's largest (1,829 output tokens): most core claims already carry 2+ independent sources; C consolidates the harness's 3-vote spec into one adversarial pass over the riskiest claims (the Darrieux/Decoin celebrity-passenger cluster, etc.). |
| 11:09:55.4 | Verifier launched [33] — the last new context allocation on the examined record. Ack at 11:09:55.7 [34]; unlike the five earlier launch acks, this record lacks a toolUseResult metadata envelope. Agent D's transcript now proves the launch nevertheless succeeded, reducing the missing envelope to a serialization-format curiosity rather than evidence of a failed spawn. |
| 11:10:02.371 | Final C record [35]: "Verification agent running. Once it reports, I'll synthesize the final dossier." Agent D had begun its own model response 31 ms earlier, so the C and D transcript streams were actively interleaved at this moment. |
Fan-out inventory
| # | agentId | angle | launched | notified | tokens | tools | duration |
|---|---|---|---|---|---|---|---|
| 1 | a76ca0f658a6b932d | Tom Slick 1937 trip | 10:48:49 | 10:59:54 | 68,973 | 49 | 11 m 05 s |
| 2 | ae006849bcbdbe48b | Normandie Sept 1937 crossing | 10:49:02 | 11:09:06 | 106,886 | 62 | 19 m 58 s |
| 3 | a9b7697419d80c685 | Late-Sept 1937 context | 10:49:12 | 10:53:30 | 42,994 | 19 | 4 m 18 s |
| 4 | a918aa7aa38c2c90a | Loch Ness craze 1937 | 10:49:21 | 10:56:35 | 60,012 | 35 | 7 m 15 s |
| 5 | a91700e439d6ea3c2 | Astor "Room" / 1937 intel travel | 10:49:34 | 10:58:37 | 81,891 | 42 | 9 m 03 s |
| 6 | ade3cea8577a12ebc | Adversarial verification | 11:09:55.545 | no completion | 19,470 input* | 1 | 9.376 s observed |
| Totals (children 1–5) | 360,756 | 207 | 51.6 m agg. |
All five search-child transcripts are now parsed directly. Final-request input versus parent notification metrics: G 68,361 vs 68,973; E 105,834 vs 106,886; K 42,531 vs 42,994; I 59,266 vs 60,012; H 81,209 vs 81,891.C’s compliance profile is worth recording: it obeyed the launch-ack guard against reading child tasks/*.output transcripts, acknowledged each notification in seconds, and under-executed the harness spec at the verify phase—one verifier where the workflow text says three votes per claim. All five search children show conventional leaf research loops with no nested agents or unresolved calls.
§7 · Agent E — ae006849bcbdbe48b (Normandie search child)
| assignment | C's second search angle: verify the late-September 1937 westbound Normandie crossing, operating details, record-season context, and notable-passenger claims. The substantive findings are omitted here. |
| runtime | 10:49:02.107 – 11:08:59.682 (19 m 57.575 s) · 171 records · 520,504 B · 45 unique model requests · 62 tool calls |
| tool mix | 20 WebSearch · 19 WebFetch · 22 Bash · 1 ToolSearch · 4 error results · no pending calls |
| final context | 105,834 input tokens on the final request (2 uncached + 1,328 cache-create + 104,504 cache-read); parent notification metric 106,886 tokens |
| turn latency | median 8.867 s; maximum before the final synthesis 25.299 s. Terminal gap 333.551 s, paired with 6,303 output tokens and classed generation-heavy rather than anomalous. |
| terminal state | Clean end_turn. Final 10,529-character answer written at 11:08:59.682; C records the completion notification at 11:09:06.8. |
Chronology
| time | event |
|---|---|
| 10:49:02.107 | Task record created with the same parent session, cwd, branch, CLI version, and sidechain status as A–C. Deferred-tool and skill-list attachments follow within 17 ms. |
| 10:49:09–10:52:29 | Direct search/fetch phase. Selects WebSearch/WebFetch, then runs repeated paired searches and fetches. Several archive pages return scraper blocks or ~30-second fetch waits. Despite repetition, tool-result cadence remains bounded and all calls resolve. |
| 10:52:38–10:53:13 | PDF extraction fallback. A Bash attempt to call pdftotext fails immediately because the binary is absent. The agent switches to Python's PDF reader, extracts a 41-page document into normandie.txt (94,536 characters), and mines only selected passages. |
| 10:53:27–10:56:01 | Expanded web research. Continues schedule, command, record-season, and passenger-claim searches. No background jobs or child agents are launched. |
| 10:56:10–10:57:40 | Wayback escalation. A direct curl to a blocked site waits 30.665 s and returns HTTP 520. The agent then uses archive availability/CDX endpoints, downloading a 74,279-byte index page and an 87,612-byte archived passenger-list page into the shared scratchpad, followed by local grep/Python extraction. |
| 10:58:01–11:01:13 | Cross-source corroboration. Further search/fetch rounds and archived-site enumeration. The transcript grows steadily rather than discontinuously; no record is larger than 21,517 B and no image/base64 payload appears. |
| 11:01:24–11:02:53 | Newspaper/API attempts. One JSON pipeline fails in 0.476 s. A later LOC query holds a Bash call for 54.231 s and then fails JSON parsing—the longest tool latency in the transcript, but fully accounted for by the external request and command. |
| 11:03:05–11:03:25.889 | Final source extraction. One fetch and two short local Bash reads complete successfully. The 11:03:25.889 Bash result is the last tool event. |
| 11:03:25.889–11:08:59.682 | Final synthesis. No intermediate JSONL records for 333.551 s, then a 6,303-token, 10,529-character answer closes with normal end_turn. At an implied ≈18.9 output tokens/s, the duration is consistent with answer generation. It ends about 0.6 s before A resumes from its own 280.7-second dead-air interval. |
| 11:09:06.8 | C receives E's completion notification, including a 13,640-character result payload and the 106,886-token / 62-tool usage footer. The notification is the final search-child completion before C plans the verifier. |
Operational profile
| measure | value | interpretation |
|---|---|---|
| JSONL size | 520,504 B | Moderate; ≈6.3× smaller than A's image-inflated transcript. |
| Tool-result text | 124,580 chars | Spread over 62 results; largest single JSONL record 21,517 B. |
| Search/fetch latency | medians 5.917 / 4.442 s | Normal bounded network-tool cadence; fetch max 30.451 s. |
| Bash latency | median 1.415 s; max 54.231 s | One failed external API curl dominates the maximum. |
| Errors | 4 | One blocked fetch, missing pdftotext, and two JSON/API parsing failures; all handled locally. |
| Nested concurrency | 0 | Leaf worker: no Agent/Task launches, no asynchronous background command, no unresolved tool call. |
E is best classified as context-and-generation-shaped. It kept a ≈106 K-token conversation live and performed sustained network/local I/O, but the transcript provides no evidence of a sudden resident-byte surge. Its likely contribution to the incident is cumulative: retained message objects, tool definitions, cache/accounting state, scratch buffers/files, and a result copied into C immediately before the terminal minute. Whether Claude Code freed the completed child promptly is not observable here and is now a key host-side discriminator.
§7A · Agent G — a76ca0f658a6b932d (Tom Slick search child)
| assignment | C's first search angle: document the 1937 European-trip claims, travel companions, return-voyage evidence, Yale context, and possible family travel. The substantive findings are omitted here. |
| runtime | 10:48:49.091 – 10:59:53.890 (11 m 04.799 s) · 135 records · 364,540 B · 30 unique model requests · 49 tool calls |
| tool mix | 20 WebFetch · 16 WebSearch · 12 Bash · 1 ToolSearch · 2 error results · no pending calls |
| final context | 68,361 input tokens on the final request (1,083 uncached + 1,854 cache-create + 65,424 cache-read); parent notification metric 68,973 tokens; 5,931 output tokens |
| turn latency | median 8.214 s; maximum before final synthesis 21.837 s. Terminal interval 73.912 s, paired with a 5,931-output-token final answer and classed generation-heavy. |
| terminal state | Clean end_turn. Final 10,841-character answer written at 10:59:53.890; every tool call has a matching result. |
Chronology
| time | event |
|---|---|
| 10:48:49.091 | Task record created as C’s first search child in the same session, cwd, branch, and Claude Code version as the other family members. Deferred-tool and skill-list attachments follow within 9 ms. |
| 10:48:54–10:53:27 | Direct search/fetch phase. Selects WebSearch/WebFetch, then runs bounded paired searches and fetches. WebSearch median latency is 5.695 s (max 8.955 s). Ordinary WebFetch calls usually complete in 2–6 s, with one 30.087-second archive-index page. |
| 10:53:36–10:55:52 | Parallel Archive.org failure. Two direct full-text fetches remain open for 133.490 and 134.374 s, then both return explicit ECONNREFUSED errors. The waits are external-tool shaped, concurrent, and fully resolved; no background task or orphaned call remains. |
| 10:55:59–10:56:17 | Curl/OCR fallback. Fetches item metadata, then downloads a 490,867-byte OCR text file as slick.txt into the shared scratchpad. The directory listing reports about 4.1 MB of visible artifacts, most created by sibling workers. The download command ends in 1.271 s and leaves no persistent process. |
| 10:56:24–10:58:16 | Local extraction. Eleven short grep/sed/Python/curl Bash calls plus one WebFetch and one WebSearch mine selected passages. Bash median latency is 0.408 s and maximum 1.271 s. The transcript grows gradually; no image/base64 payload appears. |
| 10:58:32–10:58:39.978 | Final corroboration. Two ordinary WebSearch calls complete in 5.648 and 7.798 s. The latter result is the final tool event. |
| 10:58:39.978–10:59:53.890 | Final synthesis. A 73.912-second record-silent interval ends with a 5,931-output-token, 10,841-character answer and normal end_turn. The answer size explains the interval; no separate API-path anomaly is required. |
| 10:59:54–11:00:12 | Cross-agent bracket. C receives G’s completion notification in the next second. A ingests image №1 roughly 18 seconds later. G therefore closes as a clean pre-image control while also becoming a possible completed-child retention object immediately before A’s byte expansion. |
Operational profile
| measure | value | interpretation |
|---|---|---|
| JSONL size | 364,540 B | Smallest completed high-context transcript examined so far; roughly 8.8× smaller than A’s image-inflated transcript. |
| Tool-result text | 80,469 chars | Spread over 49 results; largest result 9,180 characters. |
| Largest record | 19,575 B | A local text-extraction result, not embedded binary data. |
| Scratch artifact | 490,867 B text | File-backed and read in small slices; possible page-cache pressure, not persistent transcript bloat. |
| Errors | 2 | Two parallel connection-refused WebFetch results after about 134 s; both resolved and were handled by a local fallback. |
| Nested concurrency | 0 | Leaf worker: no Agent/Task launches, sleeps, retry loops, or asynchronous background command. |
| Completion lead | 10 m 11.031 s | Time from G’s clean end to D’s final observed record; G is an early-load/retention witness, not a terminal witness. |
G is best classified as a clean pre-inflection control and completed-child retention candidate. It adds no unexplained latency, unresolved work, or byte-scale payload. Its possible incident contribution is lifecycle-dependent: if C or the parent retained G’s ≈68 K-token conversation and copied 10.8 K-character result after completion, memory pressure increased just before A’s first image; if completed child state was promptly released, G’s direct contribution after 10:59:54 was modest.
§7B · Agent H — a91700e439d6ea3c2 (Astor/"Room" search child)
| assignment | C's fifth search angle: investigate Vincent Astor's private intelligence circle, FDR's informal transatlantic informants, and intelligence-adjacent liner travel circa 1937. The substantive findings are omitted here. |
| runtime | 10:49:34.748 – 10:58:37.816 (9 m 03.068 s) · 108 records · 402,148 B · 28 unique model requests · 42 tool calls |
| tool mix | 19 WebSearch · 11 WebFetch · 10 Bash · 1 Read · 1 ToolSearch · 2 error results · no pending calls |
| final context | 81,209 input tokens on the final request (1,121 uncached + 2,234 cache-create + 77,854 cache-read); parent notification metric 81,891 tokens; 6,367 output tokens |
| turn latency | median 8.202 s; maximum before the final synthesis 19.276 s. Terminal interval 87.789 s, paired with the 6,367-output-token final answer and classed generation-heavy. |
| terminal state | Clean end_turn. Final 14,788-character answer written at 10:58:37.816; every tool call has a matching result. |
Chronology
| time | event |
|---|---|
| 10:49:34.748 | Task record created as C’s fifth search child in the same session, cwd, branch, and Claude Code version as the other family members. Deferred-tool and skill-list attachments follow within 7 ms. This launch establishes the represented peak of at least eleven live contexts. |
| 10:49:41–10:52:22 | Direct search/fetch phase. Selects WebSearch/WebFetch, then runs repeated two- and three-call batches. WebSearch median latency is 7.455 s (max 12.790 s); WebFetch median is 5.694 s. One passenger-list fetch waits 30.065 s and returns HTTP 520, but the call resolves normally. |
| 10:52:28–10:53:58 | Wayback/local-extraction fallback. After direct article fetches return empty/blocked content and one Wayback WebFetch is explicitly rejected, H uses bounded curl calls in the shared scratchpad. Several small redirect snapshots are created before a usable archived page is downloaded and stripped to fdr-astor.txt (39,325 characters). A single Read imports that text; its 42,309-character result becomes the transcript’s largest record at 85,032 B. |
| 10:54:17–10:55:31 | Expanded corroboration. Returns to paired search/fetch work. Another archive-style fetch waits 30.451 s and returns HTTP 520. A LOC JSON pipeline fails immediately in Bash; a bounded fallback command completes in 4.702 s. No process is backgrounded and no command remains live. |
| 10:55:50–10:57:09.895 | Final source rounds. Additional search/fetch batches complete with ordinary cadence. One site returns HTTP 403 as content rather than a tool-level error. The 10:57:09.895 WebSearch result is the final tool event; all 42 calls are resolved. |
| 10:57:09.895–10:58:37.816 | Final synthesis. An 87.789-second record-silent interval ends with a 6,367-token, 14,788-character answer and normal end_turn. The output size is sufficient to explain the interval; no separate API-path anomaly is required. |
| 10:58:37.816–11:00:12 | Cross-agent bracket. H completes roughly 1 m 34.227 s before A ingests image №1. H therefore closes as a clean pre-image control and becomes a possible completed-child retention object before G’s later completion and A’s byte expansion. |
Operational profile
| measure | value | interpretation |
|---|---|---|
| JSONL size | 402,148 B | Moderate; roughly eight times smaller than A’s image-inflated transcript. |
| Tool-result text | 116,871 chars | Spread over 42 results; the largest is the 42,309-character local text read. |
| Largest record | 85,032 B | Text plus line-number/JSON overhead, not embedded binary or base64 data. |
| Scratch artifacts | 39,325-char text + small HTML files | File-backed and bounded; possible page-cache pressure, not persistent multi-megabyte transcript bloat. |
| Errors | 2 | One prohibited Wayback WebFetch and one failed LOC/JSON Bash pipeline; both handled locally. |
| Nested concurrency | 0 | Leaf worker: no Agent/Task launches, sleeps, asynchronous background commands, or unresolved calls. |
| Completion lead | 11 m 27.105 s | Time from H’s clean end to D’s final observed record; H is an early-load/retention witness, not a terminal witness. |
H is best classified as a clean pre-image control and completed-child retention candidate. It adds a substantial ≈81 K-input conversation and 14.8 K-character result, but no unexplained latency or byte-scale payload. If C or the parent retained completed child state, H’s memory remained part of the cumulative load for the final eleven minutes; if released promptly, its direct post-completion contribution was modest.
§7C · Agent I — a918aa7aa38c2c90a (Loch Ness search child)
| assignment | C's fourth search angle: characterize the state of the Loch Ness phenomenon in 1937 and what an American visitor might have encountered. The substantive findings are omitted here. |
| runtime | 10:49:21.283 – 10:56:35.873 (7 m 14.590 s) · 90 records · 276,939 B · 23 unique model requests · 35 tool calls |
| tool mix | 16 WebSearch · 11 WebFetch · 6 Bash · 1 Read · 1 ToolSearch · 2 error results · no pending calls |
| final context | 59,266 input tokens on the final request (2 uncached + 1,324 cache-create + 57,940 cache-read); parent notification metric 60,012 tokens; 5,286 output tokens |
| turn latency | median 9.117 s; maximum before the final synthesis 16.650 s. Terminal interval 67.253 s, paired with the 5,286-token final answer and classed generation-heavy. |
| terminal state | Clean end_turn. Final 12,417-character answer written at 10:56:35.873; every tool call has a matching result. |
Chronology
| time | event |
|---|---|
| 10:49:21.283 | Task record created as C's fourth search child in the same session, cwd, branch, and Claude Code version as the other family members. Deferred-tool and skill-list attachments follow within 13 ms. This child was launched while the represented family was climbing toward its ≥11-context peak. |
| 10:49:25–10:53:25 | Direct search/fetch phase. Selects WebSearch/WebFetch, then runs bounded paired and batched requests. WebSearch median latency is 7.223 s (max 13.500 s); WebFetch median is 6.650 s (max 11.347 s). No long network wait, sleep, retry loop, or background process appears. |
| 10:53:16–10:53:25 | PDF acquisition. A WebFetch returns an academic PDF as binary and reports saving a 595.3 KB file in the shared tool-results directory. The PDF is not embedded into the JSONL; the result record contains only a short explanatory message and path. |
| 10:53:37–10:53:44 | Two bounded extraction failures. pdftotext is absent (exit 127), and a Read attempt cannot render pages because pdftoppm is absent. Both fail in under 0.6 s and leave no live process. |
| 10:53:51–10:54:30 | Python/local-text fallback. Short-lived Python commands decompress PDF streams, write coolabah.txt with 72,589 characters, and mine selected passages with grep/Python. Bash median latency is 0.399 s; maximum 0.574 s. The largest local extraction result contains 6,434 characters. |
| 10:54:43–10:55:28.530 | Final corroboration. Two WebSearch calls, two WebFetch calls, and a final WebSearch complete with ordinary cadence. The 10:55:28.530 result is the last tool event; all 35 calls are resolved. |
| 10:55:28.530–10:56:35.873 | Final synthesis. A 67.253-second record-silent interval ends with a 5,286-output-token response and normal end_turn. The final request header appears at 10:56:35.783 and the 12,417-character text record 90 ms later, consistent with completion-time flushing. |
| 10:56:35.873–11:00:12 | Cross-agent bracket. I completes about 3 m 36 s before A ingests image №1, about 2 m 02 s before H completes, and about 13 m 29 s before D's final record. It is therefore an early control and possible completed-child retention object, not a terminal witness. |
Operational profile
| measure | value | interpretation |
|---|---|---|
| JSONL size | 276,939 B | Small and gradual; roughly 11.6× smaller than A's image-inflated transcript. |
| Tool-result text | 66,678 chars | Spread over 35 results; largest result is a 6,434-character local text extraction. |
| Largest record | 13,887 B | The final text record, not embedded binary or base64 data. |
| Scratch artifacts | 595.3 KB PDF + 72,589-char text | File-backed and handled by short-lived commands; possible page-cache pressure, not persistent transcript bloat. |
| Errors | 2 | Missing pdftotext and missing pdftoppm; both fail immediately and are recovered with Python. |
| Nested concurrency | 0 | Leaf worker: no Agent/Task launches, sleeps, retry loops, asynchronous background commands, or unresolved calls. |
| Completion lead | 13 m 29.048 s | Time from I's clean end to D's final observed record; I is an early-load/retention witness. |
I is best classified as a clean peak-concurrency control and completed-child retention candidate. It ran during the family’s highest represented context count, handled a modest binary file without embedding it in the transcript, and ended normally. Its possible incident contribution is lifecycle-dependent: if C or the parent retained I’s ≈59 K-input conversation, tool schemas, PDF/result metadata, and 12.4 K-character answer after completion, it added to cumulative memory for the final thirteen minutes; if promptly released, its direct post-completion contribution was small.
§7D · Agent K — a9b7697419d80c685 (late-September 1937 context child)
| assignment | C's third search angle: reconstruct the late-September 1937 European political and cultural moment an American sailing home would have just experienced. The substantive findings are omitted here. |
| runtime | 10:49:12.005 – 10:53:30.126 (4 m 18.121 s) · 50 records · 175,282 B · 12 unique model requests · 19 tool calls |
| tool mix | 12 WebSearch · 6 WebFetch · 1 ToolSearch · 0 error results · no pending calls |
| final context | 42,531 input tokens on the final request (2 uncached + 668 cache-create + 41,861 cache-read); parent notification metric 42,994 tokens; 7,384 output tokens |
| turn latency | median 6.785 s; maximum before the final synthesis 12.862 s. Terminal interval 89.873 s, paired with the 7,384-output-token final answer and classed generation-heavy. |
| terminal state | Clean end_turn. Final 17,182-character answer written at 10:53:30.126; every tool call has a matching result. |
Chronology
| time | event |
|---|---|
| 10:49:12.005 | Task record created as C's third search child in the same session, cwd, branch, and Claude Code version as the other family members. Deferred-tool and skill-list attachments follow within 9 ms. |
| 10:49:16.880 | Selects WebSearch/WebFetch through a ToolSearch call; the result returns in 22 ms. No other tool family is used. |
| 10:49:23–10:51:37 | Bounded search phase. Twelve WebSearch calls run mostly as paired batches. Median latency is 8.056 s and maximum 12.285 s. At 10:49:34 C launches H, establishing the represented ≥11-context peak; K continues receiving ordinary results throughout. |
| 10:50:10–10:52:00 | Targeted fetch phase. Six WebFetch calls are interleaved with searches. Median latency is 5.796 s and maximum 6.902 s. No fetch is recorded as an error, and the agent never escalates to Bash, local files, retries, sleeps, or background work. |
| 10:52:00.253 | Last tool result. The final WebFetch resolves normally. All 19 tool calls are paired with results. |
| 10:52:00.253–10:53:30.126 | Final synthesis. An 89.873-second record-silent interval ends with a 7,384-output-token, 17,182-character answer and normal end_turn. The final request's first record appears at 10:53:29.177 and the text record follows 0.949 s later, a completion-flush pattern consistent with generation rather than an API-path stall. |
| 10:53:30 | Cross-agent bracket. K is the first directly established family completion. C receives the result in the same second, the represented live census drops below its ≥11 peak, and J continues normally for another ≈2 minutes. K precedes A's first image by about 6 m 42 s and D's final record by 16 m 34.795 s. |
Operational profile
| measure | value | interpretation |
|---|---|---|
| JSONL size | 175,282 B | Smallest directly examined completed high-context transcript; roughly 18.3× smaller than A's image-inflated transcript. |
| Tool-result text | 42,962 chars | Spread over 19 results; largest result 4,164 characters. |
| Largest record | 18,835 B | The final text answer, not embedded binary data. |
| Scratch/process footprint | none observed | No Bash, Read, local file, image, subprocess, retry loop, sleep, or background task. |
| Errors | 0 | All managed web calls resolved without a tool-level error. |
| Nested concurrency | 0 | Leaf worker: no Agent/Task launches or asynchronous work. |
| Completion lead | 16 m 34.795 s | Time from K's clean end to D's final observed record; K is a peak-concurrency and long-retention witness, not a terminal witness. |
K is best classified as a clean peak-concurrency control and completed-child retention candidate. It adds no unexplained latency, unresolved work, byte-scale payload, or process residue. Its possible incident contribution is lifecycle-dependent: if C or the parent retained K's ≈42.5 K-input conversation and 17.2 K-character result after completion, that state persisted longer than any other completed child; if promptly released, K's direct post-10:53:30 contribution was modest.
§8 · Agent D — ade3cea8577a12ebc (adversarial verifier)
| assignment | Adversarially test five selected claims from C's dossier, using WebSearch and WebFetch; return concise verdicts. The historical claim text is intentionally not reproduced here. |
| runtime observed | 11:09:55.545 – 11:10:04.921 · 9.376 s · 6 JSONL records · 15,368 B |
| model / request | claude-fable-5 · one model request (req_011C…) streamed across two assistant records |
| tool activity | 1 successful ToolSearch lookup selecting WebSearch and WebFetch; 0 actual web searches, 0 fetches |
| token accounting | 2 uncached input + 10,767 cache-creation + 8,701 cache-read; 124 output on the completed request. This is request accounting, not a full-session total. |
| terminal state | Successful tool result written; next assistant turn never begins. No error, cancellation, shutdown, or completion record. |
Chronology
| time | event |
|---|---|
| 11:09:55.545 | Task record created [0], with parentUuid=null inside the child transcript and the same parent session ID as A–C. It falls within the same few tenths of a second as C's dispatch and launch-ack records. |
| 11:09:55.684–.697 | Deferred-tool delta and 19-skill listing attached [1–2]. These two records account for 8,900 B, or 57.9% of the tiny transcript. |
| 11:10:02.340 | First assistant stream record [3], after 6.643 s of model-start latency from the final attachment (6.795 s from task creation). The record contains an empty thinking block and reports the request's cache/input accounting. |
| 11:10:02.371 | Agent C writes its own final status line. D's first assistant record precedes it by 31 ms, directly establishing concurrent/interleaved execution at this moment. |
| 11:10:03.566 | The same request emits ToolSearch(select:WebSearch,WebFetch) [4], 1.226 s after its first stream record. Stop reason is normal tool_use. |
| 11:10:04.921 | Final record [5]: successful tool result identifying both requested tools and total_deferred_tools=16, 1.355 s after dispatch. No later assistant request appears, so D died or was abandoned between receiving the tool definitions and issuing its first substantive web query. |
The verifier transcript resolves the strongest open discriminator in v1.2: the child got well past spawn. It also changes the likely terminal operation. The last observed action is not context allocation but a successful tool-result ingestion. The next expected step would have been a new assistant turn able to call the selected web tools; no such turn left a transcript record.
§9 · Cross-correlation
Established family structure. The root transcript directly records all five depth-1 launches: J, B, A, F, and C. C's transcript and the depth-2 manifests establish G, E, K, I, H, and D beneath C. The root's own pendingBackgroundAgentCount=10 at 10:50:12 and 10:51:23 establishes eleven simultaneous session-family contexts including the root. The machine survived that count for more than three minutes, so count alone was not an immediate trigger.
Fork-manifest corroboration. The four attached depth-1 manifests align one-for-one with J, B, A, and F; the five attached depth-2 manifests align one-for-one with G, E, K, I, and H and explicitly identify C as parent. Their nine unique launch IDs exclude accidental duplication or a single launch record being reused to represent multiple agents. This materially strengthens the topology and ≥11-context census, while leaving the shared-process and completed-state-retention claims implementation-dependent.
Root-state telemetry. The counter sequence 8 → 10 → 9 → 7 → 4 matches the independently reconstructed launch/completion history. At 11:02:21, the remaining four are exactly A, B, C, and E. The root itself is in a clean waiting state with ≈128 K input tokens; it contributes retained context and registry pressure but no visible stall.
K, J, I, H, G, and F progressively bracket the onset of degradation. K completes cleanly at 10:53:30.126, about 6 m 42 s before A ingests image №1; J then completes at 10:55:31.229, about 4 m 41 s before the image. I completes at 10:56:35.873, about 3 m 36 s before the image; H at 10:58:37.816, about 1 m 34 s before it; and G at 10:59:53.890, roughly 18 s before it. F then completes its 12,901-output-token synthesis at 11:00:40.574—after image №1 but before image №2. A's second image arrives at 11:01:11, and its first clearly abnormal waits begin at 11:01:37. Ordinary high-context work therefore remains viable at the 11-context peak, after multiple completions, before image №1, and after image №1; transcript-visible degradation follows image №2 plus A's backgrounded curl.
E clarifies the long pre-terminal interval. From 11:03:25.889 to 11:08:59.682, E was producing its final 6,303-token answer while A was simultaneously inside most of its 280.7-second dead-air interval and B was inside its 396.5-second download loop. E's final write and A's resumed assistant stream are separated by about 0.6 s. This is a genuine convergence of completions, but E's output length explains its own delay, so the coincidence does not by itself establish shared starvation or scheduler recovery.
Established terminal sequence. K, J, I, H, G, and F have completed earlier. E completes at 11:08:59.682 and its notification reaches C at 11:09:06.8. The four streams that do not complete then end in order A → B → C → D: A at 11:09:56.308 with two unanswered calls; B at 11:09:57.071 after a successful Bash result; C at 11:10:02.371 while awaiting D; and D at 11:10:04.921 after a successful ToolSearch result. The non-completing four-stream spread remains 8.613 s. D proves the executor family remained capable of starting a model turn, dispatching a tool call, and recording its result after A, B, and C had written their final records. The 11:12:31 screen capture then directly shows the rust terminal process exited with code 1, supplying a hard upper bound but not the exact exit instant.
Host-pressure sequence. By 11:06:18, before E completed and before D existed, Windows physical memory was 97% occupied and the NVMe device was saturated with 390 MB/s reads. By 11:09:48—49 seconds after E's clean end and seven seconds before D's launch—memory had fallen to 85%, yet disk active time remained 100%. The decline prevents a claim that physical host RAM simply rose without interruption until 11:10. It is consistent with reclaim, paging, garbage collection, or release of one of the concurrent workloads. The timing across E's completion is suggestive but not attributable.
Resource interpretation. The root adds an ≈128 K-token model context, five launch records with 25,517 prompt characters, direct child-result payloads, a task registry, a scheduled wakeup, and an 824.5 KB transcript. It is not A-sized in raw image bytes, but it is a substantial long-lived owner. K, J, I, H, G, F, and E are cleanly completed high-context workers without image-scale transcript payloads. If completed sidechain state was retained, the final minute accumulated these objects in or beneath the root; if promptly freed, their direct memory contribution should have fallen sharply after completion. The transcripts cannot discriminate between those implementations.
Morning concurrency milestones
| time | established event | incident significance |
|---|---|---|
| 10:43:06 | Root session starts with large reference context. | Long-lived owner/registry exists before any agent launch. |
| 10:46:24–10:48:05 | J, B, A, F, then C start within 101 s. | Five top-level sidechains become live in one parent family. |
| 10:49:34 | C launches H, its fifth search child. | Topology reaches eleven contexts; the root counter confirms 10 pending by 10:50:12. |
| 10:53:30.126 | K, C's third-launched child, completes normally. | First directly established family completion; peak context count subsides without an immediate crash, while J and the other live streams remain healthy. |
| 10:55:31.229 | J completes normally. | Earliest completed top-level sibling; clean ≈73 K-input peak-concurrency control and possible retained-state object. |
| 10:56:35.873 | I completes normally and reports to C. | Clean ≈59 K-input child becomes another possible retained-state object. |
| 10:58:37.816 | H completes normally and reports to C. | Clean ≈81 K-input child completes before A's image expansion. |
| 10:59:53.890 | G completes normally; C receives its result at about 10:59:54. | Clean ≈68 K-input child completes roughly 18 s before image №1. |
| 11:00:12 | A reads image №1 into context. | First multi-megabyte message-array expansion. |
| 11:00:40 | F completes normally. | Useful control: no family-wide collapse after image №1. |
| 11:01:11–11:01:37 | A reads image №2, then develops abnormal waits. | Earliest transcript-visible degradation window. |
| 11:08:59–11:09:55 | E completes; C ingests its result and launches D. | Completed-state retention and a fresh context allocation converge. |
| 11:10:04.921 | D records a successful ToolSearch result; no examined active stream writes again. | Last healthy family record; left edge of the silence interval. |
Latency classification
| agent · time | duration | event | class |
|---|---|---|---|
| Root · 10:43–11:02 | all turns complete | 24 model requests, 26 matched tools; clean waiting end_turn | large but normal |
| K · 10:49–10:52 | ≤12.285 s | All 18 web-tool calls; no Bash, Read, files, or background work | normal bounded path |
| K · 10:52:00 | 89.873 s | final synthesis, 7,384 output tokens | generation-heavy |
| J · 10:46–10:53 | ≤8.189 s | All 44 web-tool calls; no Bash, Read, files, or background work | normal bounded path |
| J · 10:53:39 | 111.646 s | final synthesis, 7,631 output tokens | generation-heavy |
| I · 10:49–10:55 | ≤13.500 s | All web-tool calls; local PDF fallback commands ≤0.574 s | normal bounded path |
| I · 10:55:28 | 67.253 s | final synthesis, 5,286 output tokens | generation-heavy |
| B · 10:52:29 | 45.4 s | literal sleep 45 in command [101] | by design |
| H · 10:50:48 | 30.065 s | passenger-list WebFetch ending in HTTP 520 content | external-tool wait; explained |
| B · 10:53:31 | 101.0 s | 5-attempt retry loop, sleep 20 [104] | by design |
| G · 10:53:36 | 133–134 s | two parallel Archive.org WebFetch calls ending in explicit connection-refused errors | external-tool wait; explained |
| H · 10:54:38 | 30.451 s | archive-style WebFetch ending in HTTP 520 content | external-tool wait; explained |
| H · 10:57:09 | 87.789 s | final synthesis, 6,367 output tokens | generation-heavy |
| G · 10:58:39 | 73.912 s | final synthesis, 5,931 output tokens | generation-heavy |
| B · 11:01:08 | 68.7 s | 8-page XML download loop [182], ≈8.6 s/page | by design |
| B · 11:03:20 | 396.5 s | 20-page XML loop [194], requested timeout 600 s; ≈19.8 s/page | by design / ambiguous |
| F · 10:57:39 | 180.558 s | final synthesis, 12,901 output tokens; recorder flushes answer at completion | generation-heavy |
| E · 11:01:59 | 54.231 s | LOC curl/API request followed by JSON parse failure | external-command wait; explained |
| E · 11:03:25 | 333.551 s | final synthesis, 6,303 output tokens (≈18.9 tok/s) | generation-heavy |
| C · 10:49–11:09 | 4–20 min | five search-child runtimes; harness-requested parallelism | by design |
| C · 11:09:06 | 48.6 s | E notification→verifier dispatch; 1,829 output tokens | borderline, classed normal |
| D · 11:09:55 | 6.795 s | task creation→first assistant record | normal |
| D · 11:10:03 | 1.355 s | ToolSearch dispatch→successful result | normal |
| A · 11:01:37 | >120 s | curl auto-backgrounded; completion never appears | anomalous / unresolved |
| A · 11:01:37 | 128 s | WebSearch versus 4–10 s baseline | anomalous |
| A · 11:04:19 | 280.7 s | last result→next assistant stream; only 462 output tokens | anomalous |
| A · 11:09:56 | unresolved | WebFetch + Bash dispatched; no results | terminal |
§10 · Failure mechanism
Not a model context-limit failure. The root's final request carried 128,067 input tokens and ended normally. K completed with 42,531 final-request input tokens; J 73,154; A ended at ≈112 K; B ≈94 K; I 59,266; H 81,209; G 68,361; F 89,548; C held ≈62 K; E 105,834; and D's only request carried roughly 19.5 K. None shows a context-limit error, model refusal, explicit cancellation, or graceful shutdown associated with the incident.
None of the seven directly examined completed workers is a hidden byte bomb. K's transcript is 175,282 B, J's transcript is 376,539 B, I's 276,939 B, H's 402,148 B, G's 364,540 B, F's 473,981 B, and E's 520,504 B. K and J created no files or subprocesses at all; the others used modest file-backed PDF/text artifacts and short-lived commands. None contains base64 images or an unresolved call. They contribute context, result objects, I/O, and possible page-cache pressure, but none resembles A's two embedded image payloads and repeatedly serialized ≥3.2 MB message array.
What the fork manifests add. They show that the five research leaves were all directly registered under C and that the four row workers were separate depth-1 siblings. This makes C the natural common registry/notification locus for G, E, K, I, and H, which is consistent with—though does not prove—the completed-child-retention hypothesis. Because the files contain no lifecycle, heap, PID, timestamp, or completion fields, they add no direct evidence for OOM causation or the exact death point.
What the root transcript adds. It converts the launch topology and peak count from inference to direct evidence. It also reveals a large ≈128 K-token owner context, direct-child result copying, queue-level serialization of nested completion payloads, a still-pending 11:15 wakeup, and exact live-agent counters. It does not provide heap/RSS telemetry or prove that queued/completed objects remained resident.
Cumulative host/process pressure remains the best fit. The family held eleven simultaneous contexts, with the root itself already near 97 K input tokens at peak and reaching ≈128 K by 11:02. Near 11:01 the executor family may have combined the root's context/registry, completed K/J/I/H/G state if retained, A's multi-megabyte message array, B's long-lived download/OCR work, C's orchestration and notifications, E's growing ≈106 K context, F's ≈89.5 K conversation if retained, shell/file buffers, and other fleet workers under the 8 GB WSL cap. Count alone was survivable; accumulation, serialization, fragmentation, swap, and retention remain the plausible mechanism.
The clean controls sharpen the onset, not the terminal cause. K remains healthy through the full 11-context peak and completes ≈402 s before image №1; J remains healthy through the peak and completes 281 s before image №1; I completes 216 s before it; H 94 s before it; G 18 s before it; and F completes after image №1 but before image №2. This makes a global service failure before 11:00:40 unlikely and weakens claims that peak context count or image №1 alone immediately destabilized the family. The first visible stress follows image №2 and A's backgrounded network command. Any later contribution from K/J/I/H/G/F depends on completed-state retention.
Lifecycle uncertainty remains load-bearing, but the screenshots add a counter-signal. K finishes at 10:53:30.126, J at 10:55:31.229, I at 10:56:35.873, H at 10:58:37.816, G at 10:59:53.890, F at 11:00:40.574, and E at 11:08:59.682. The 10:56 UI proves completed-task metadata remained visible, but not that full conversations remained resident. More importantly, Windows physical-memory use falls by about 1.9 GB between 11:06:18 and 11:09:48, a period containing E's completion. That decrease is compatible with at least some release or reclaim, although it could involve unrelated processes or page-cache behavior. The retention hypothesis is therefore plausible but no longer should be treated as the default explanation for all completed contexts.
Terminal operation and bounds. D survived allocation, completed a model turn, dispatched ToolSearch, and ingested the result at 11:10:04.921. The next assistant turn never appears. The likely cessation point remains soon after that record, possibly during construction or scheduling of D's next request, but this is inference from normal latencies. The direct screen evidence only establishes that the rust terminal process had exited by 11:12:31. Its reported code 1 is non-diagnostic; a raw Linux SIGKILL often surfaces differently, but WSL, terminal, shell, or CLI wrappers can translate the status.
Best-fit factual chain. (1) The root begins with a large reference context and directly launches J, B, A, F, and C. (2) C chooses the deep-research harness and adds five search children; the root counter reaches 10 pending, proving eleven family contexts. (3) At least one separate bg-nitro Claude session is also active. (4) K, J, I, H, and G complete normally while the root's counter falls predictably; F completes after A's first image. (5) A ingests image №2 and soon develops path-specific stalls while the clean root waits and B/C/E continue. (6) At 11:02 the root ends normally with 128,067 input tokens and four pending workers. (7) By 11:06:18 the Windows host is at 97% RAM and 100% disk active time with read-heavy I/O. (8) E completes at 11:08:59.682; by 11:09:48 RAM has dropped to 85% but disk remains saturated. (9) C launches D at 11:09:55.545. (10) A, B, and C cease producing records, while D remains briefly healthy. (11) After D's successful tool-definition result at 11:10:04.921, no examined active member writes again. (12) The rust terminal is visibly exited by 11:12:31. This is strongly consistent with a memory-pressure-related process failure, but it does not identify the victim mechanism or prove a kernel OOM selection.
Alternative explanations not excluded. A's 280.7-second gap could include API retry/backoff, serialization delay, or uplink contention. The 100% disk activity could be pagefile/WSL-swap thrash, but Task Manager does not attribute it and ordinary file or cache reads remain possible. The 1.9 GB memory decrease could indicate successful reclaim rather than impending physical-RAM exhaustion. The terminal cluster could reflect a Claude/Node internal failure, parent cancellation, transcript failure, WSL instability, or a non-memory process crash. Exit code 1 is compatible with many of these. Any alternative must still explain severe directly observed host pressure, four active streams going silent within 8.6 seconds, and a terminal process exit shortly afterward.
Behavioral interpretation. The load contributions are differently shaped: the root was large-context / registry / result-retention-shaped; K was ordinary-managed-web / completed-child-shaped; J was ordinary-managed-web / completed-sibling-shaped; A byte-shaped; B duration/transfer-shaped; C count/orchestration-shaped; I ordinary-search / PDF-local-extraction / completed-child-shaped; H ordinary-search / local-text-read / completed-child-shaped; G ordinary-search / local-text-extraction / completed-child-shaped; F ordinary-search / large-final-output / completed-sibling-shaped; E context-and-generation-shaped; and D a fresh allocation/tool-materialization step. Each acted locally within its instructions. The failure risk emerged from aggregate work without a fleet-wide budget for resident bytes, active and completed contexts, swap headroom, child-process count, or wall-clock occupancy.
§11 · Corroboration checklist
- Kernel log: dmesg -T | grep -iE 'oom|killed' or journalctl -k -S "2026-07-11 10:45" -U "2026-07-11 11:20" in the guest → confirms in-guest OOM, victim PID, and RSS at kill time.
- Windows/WSL scope: Event Viewer and WSL service logs around 11:10 → distinguish one-process OOM selection from a guest/VM restart or vmmem collapse.
- Attribute the 100% disk interval: retrieve Windows Resource Monitor, Performance Monitor, Sysinternals Process Monitor, or any historical counters for 11:05–11:10. Key counters are per-process I/O, page reads/sec, hard faults/sec, commit charge, compressed memory, vmmemWSL working set, and pagefile usage. This is the fastest way to distinguish paging/reclaim from ordinary file reads.
- Resolve exit code 1: inspect the shell wrapper, Windows Terminal profile, WSL launch logs, Claude CLI stderr, tmux server logs, and any supervisor status. Determine whether a signal or WSL termination was translated to 0x00000001, or whether Claude exited through its own error path.
- Other workers: collect last-write timestamps and memory/process telemetry from polecats in the other tmux sessions. The entire represented 28797a95… family is now directly accounted for; a separate fleet-wide stop cluster near 11:10:05 would favor guest-wide exhaustion, while only this process family stopping would favor targeted parent-process death.
- Root registry and notification retention: the root transcript is now parsed. Reproduce the 10-pending-agent state and inspect Node heap snapshots before/after direct child completion, nested enqueue/remove events, scratchpad archival, and the 11:15 wakeup registration. Determine whether task objects, prompts, result text, queue payloads, and completed conversations remain strongly referenced.
- Completed-sidechain retention: determine whether Claude Code v2.1.207 releases conversation/request objects after a top-level sibling or nested child completes. Correlate heap/RSS with the observed 11:06:18→11:09:48 host-memory drop, then run a Node heap snapshot or controlled reproduction with a ≈42.5 K child (K-shaped), a ≈73 K-input sibling (J-shaped), ≈59/81/68 K children (I/H/G-shaped), one ≈90 K sibling (F-shaped), and one ≈106 K child (E-shaped) would directly test the load-bearing lifecycle hypothesis.
- Verifier continuation: check any separate tasks/ade3cea8577a12ebc.output, notification queue, or parent-side task metadata for writes after 11:10:04.921. Anything after ≈11:10:15 would challenge the inferred death window.
- Agent A background task: find shell/process metadata for bciscvn9q. Confirm whether it was still live at failure, whether it held pipes/buffers, and whether its 120-second timeout spawned a lingering process tree.
- Heap and request-size reproduction: replay two image reads of A's approximate dimensions while several 42–106 K-token child contexts and 73–90 K-token sibling contexts are active or completed-but-retained. Record Node RSS/heap, WSL available memory, swap, serialized request sizes, and garbage-collection pauses.
- Completed-task registry and output retention: inspect C's task registry and tasks/*.output handling after K's 10:53:30 completion and the later child completions. Determine whether completed transcript objects, 17.2 K-character result text, tool schemas, or output-file buffers remained referenced in the Node heap.
- Missing fork metadata and launch registry: collect the corresponding *.meta.json files for C and D, plus the root parent's task registry if available. C's manifest could independently name its depth-1 launch call; D's could confirm spawnDepth: 2 and its parent field. Registry lifecycle fields, if any, would be more probative than the minimal manifests for determining whether completed task objects remained referenced.
§12 · Document log
| version | entry |
|---|---|
| v1.0 | Agent A (a5dbd91269fe4e878) reconstructed: chronology, image-ingestion inflection, terminal in-flight calls, initial OOM inference. |
| v1.1 | Agent B (aa0360d207cb6f145) added. Cross-correlation established: row batching, shared executor, 0.763 s co-termination, kill window 11:09:57–≈11:10:15. Agent B's long runtimes reclassified as self-requested (timeout escalation to 600 s); anomaly set narrowed to Agent A's API path; the checklist extended with kill-scope discriminator. |
| v1.2 | Agent C (adb5ce21a4c09bafd) added — the parent's third known sidechain and its first non-row task: a deep-research orchestrator that fanned out five search children and one verifier (six claude-fable-5 contexts; 360,756 child tokens, 207 child tool calls). Parent dispatch pattern reclassified heterogeneous. Kill-window left bound revised 11:09:57.1 → 11:10:02.4 (conditional on shared executor); A/B co-termination downgraded from kill signature to coincident final writes; family peak census (≥9 contexts, survived) dated 10:49:34–10:53:30, sharpening the cumulative-pressure reading; last new allocation on record identified as the verifier spawn at T−7 s; missing toolUseResult envelope on the final launch ack logged as a weak signal. Checklist gains verifier-file and child-transcript discriminators (items 5–6); sections renumbered. |
| v1.3 | Agent D (ade3cea8577a12ebc) added from its 6-record transcript. Established that the verifier launched successfully, began a model turn, selected WebSearch/WebFetch, and received a normal ToolSearch result at 11:10:04.921; it never issued a web query. Kill-window left bound revised 11:10:02.371 → 11:10:04.921 (shared-executor reading). The verifier spawn is downgraded from possible instant trigger to possible marginal contributor; next-request construction/scheduling becomes the final unobserved operation. Four-stream terminal spread measured at 8.613 s; checklist updated to treat verifier existence as resolved and pursue continuation/host logs. |
| v1.4 | Agent E (ae006849bcbdbe48b) added from its 171-record, 520,504-byte transcript. Direct parsing confirms 45 model requests, 62 tool calls, four handled errors, ≈105.8K final input context, no nested agents, no embedded images, no unresolved calls, and a clean end at 11:08:59.682. Its 333.551-second terminal interval is reclassified as proportional final-answer generation (6,303 output tokens), not an unexplained stall. E's completion precedes A's resumed stream by about 0.6 s and reaches C about 7.1 s later. Failure inference is refined: E adds sustained context and possible completed-child retention pressure, but not a byte-scale trigger; the 11:10:04.921 kill-window bound is unchanged. |
| v1.5 | Agent F (ae58ff585d384f484) added from its 153-record, 473,981-byte transcript. Direct parsing confirms 30 model requests, 60 fully resolved tool calls, 89,548 final input tokens, a 12,901-output-token clean synthesis, no nested agents/background tasks, no embedded images, and no unexplained latency. F is established as a fourth top-level sibling and raises the represented peak census from ≥9 to ≥10. Its clean embedded end at 11:00:40.574—after A’s first image but before A’s second and subsequent stalls—narrows the visible onset of degradation. The terminal bound remains 11:10:04.921; lifecycle-retention analysis now covers both completed sibling F and completed child E. |
| v1.6 | Agent G (a76ca0f658a6b932d) added from its 135-record, 364,540-byte transcript. Direct parsing confirms 30 model requests, 49 fully resolved tool calls, two explicit connection-refused fetch errors, 68,361 final-request input tokens, a 5,931-output-token clean synthesis, no nested agents, no embedded images, and no unresolved calls. G ends at 10:59:53.890, roughly 18 seconds before A’s first image, and therefore becomes both a clean pre-inflection control and a completed-child retention candidate. The operator’s prior external 11:09 last-written statement is corrected to approximately 11:00 and removed as a metadata discrepancy. Three search-child transcripts remain unexamined; the terminal bound remains 11:10:04.921. |
| v1.7 | Agent H (a91700e439d6ea3c2) added from its 108-record, 402,148-byte transcript. Direct parsing confirms 28 model requests, 42 fully resolved tool calls, two handled errors, 81,209 final-request input tokens, a 6,367-output-token clean synthesis, no nested agents, no embedded images, and no unresolved calls. Its largest record is an 85,032-byte local text read rather than binary data. H ends at 10:58:37.816, about 1 m 34 s before A’s first image, and becomes a second clean pre-image child control plus a completed-state retention candidate. Two search-child transcripts remain unexamined; the terminal bound remains 11:10:04.921. The operator’s corrected external last-written observation remains approximately 11:00, not 11:09. |
| v1.8 | Agent I (a918aa7aa38c2c90a), C’s Loch Ness search child, parsed directly. Established a clean end_turn at 10:56:35.873 after 23 model requests and 35 resolved tool calls; transcript 276,939 B with no images, background work, or unresolved calls. Its only notable fallback was a 595.3 KB file-backed PDF converted to 72,589 characters by short-lived Python commands after two immediate missing-tool errors. Added I as the earliest directly examined peak-concurrency control and a completed-state retention candidate; five clean completed leaves are now represented. Cross-correlation, mechanism, checklist, and family inventory updated; last healthy family record remains 11:10:04.921; likely cessation ≈11:10:15 is inferred; process exit is directly observed by 11:12:31. |
| v1.9 | Agent J (a855ec32728138338), the previously unexamined rows 1–8 top-level sibling, parsed directly. Established a clean end_turn at 10:55:31.229 after 27 model requests and 45 fully resolved tool calls; transcript 376,539 B, 73,154 final-request input tokens, 7,631 output tokens, one fast connection-refused error, no images, files, shell work, nested agents, background tasks, or unresolved calls. J was active throughout the represented peak, raising the established census to ≥11 live contexts, then completed 4 m 41 s before A's first image. It is added as the earliest completed top-level control and retained-state candidate. Family structure, concurrency milestones, mechanism, and checklist updated; the last healthy family record remains 11:10:04.921; likely cessation ≈11:10:15 is inferred; process exit is directly observed by 11:12:31. |
| v1.10 | Agent K (a9b7697419d80c685), C's previously unexamined late-September 1937 context child, parsed directly. Established a clean end_turn at 10:53:30.126 after 12 model requests and 19 fully resolved tool calls; transcript 175,282 B, 42,531 final-request input tokens, 7,384 output tokens, no errors, images, files, shell work, nested agents, background tasks, or unresolved calls. K was active throughout the represented ≥11-context peak and is now the first directly established family completion, roughly 6 m 42 s before A's first image. All five C search children are now directly examined. K becomes the longest-duration completed-child retention candidate; the last healthy family record remains 11:10:04.921; likely cessation ≈11:10:15 is inferred; process exit is directly observed by 11:12:31. |
| v1.11 | Nine fork manifests parsed directly. Established four spawnDepth: 1 general-purpose row workers (J, B, A, F), five spawnDepth: 2 general-purpose search children (G, E, K, I, H), explicit parent adb5ce21a4c09bafd on every depth-2 file, and nine unique launch toolUseId values. The metadata independently corroborates C's ownership of the five-way fan-out and the represented ≥11-live-context peak, but contains no timestamps, process IDs, completion state, token counts, or memory fields. No OOM or terminal-timing inference changes; the last healthy family record remains 11:10:04.921; likely cessation ≈11:10:15 is inferred; process exit is directly observed by 11:12:31. |
| v1.12 | Root session 28797a95-fc9a-450c-a3e8-bec3d7af2cd0 parsed directly: 191 records, 824,502 B, 24 model requests, 26 matched tools, five direct Agent launches, and 128,067 input tokens on its final clean request. Direct launch times and IDs resolve the root-to-J/B/A/F/C topology; pendingBackgroundAgentCount=10 directly proves the eleven-context peak. Root queue routing distinguishes direct-child model-visible notifications from nested completion bookkeeping. The root last generated at 11:02:19 and only logged queue removal at 11:09:05, so it is classified as a large-context/registry contributor rather than a terminal witness. Failure bound remains 11:10:04.921–≈11:10:15. |
| v1.13 | Eight timestamped screen captures integrated. Directly established a separate active bg-nitro Claude session; live rust manager snapshots consistent with J's completion, B's long XML loop, and A's growth to 110.3 K displayed tokens; Windows host pressure at 11:06:18 (14.8/15.2 GB, 97% RAM; 100% NVMe active time; 390 MB/s reads) and persistent disk saturation at 11:09:48 despite memory falling to 12.9/15.2 GB (85%); and a rust terminal visibly exited with generic code 1 by 11:12:31. The last-family-record bound remains 11:10:04.921, ≈11:10:15 is explicitly downgraded to an inferred likely cessation bound, and 11:12:31 becomes the hard observed exit upper bound. OOM/memory-pressure inference is strengthened, while monotonic-RAM-growth and universal completed-context-retention claims are weakened. |
Reconstructed from direct scripted analysis of the root transcript, eleven descendant transcripts, and nine fork manifests; substantive historical travel-research findings were intentionally excluded.
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