investigate-run

name	investigate-run
description	Post-mortem analysis of a PhysicsIntern workspace run (Claude Code, Pi, Codex, or OpenCode host). Reconstructs the trajectory from the session record — JSONL file(s) for Claude/Pi/Codex, the SQLite store for OpenCode — audits methodology adherence against the workspace's own CLAUDE.md / AGENTS.md and skill/agent prompts, checks commit discipline and flag dispositions, and assesses substantive quality. Produces a thorough evidence-anchored markdown report. Use after a workspace has been worked on to identify what went well, where the methodology slipped, and what prompts to improve.
context	fork
agent	general-purpose
arguments	["workspace_path","session_id"]

Investigate PhysicsIntern Run

You are auditing a PhysicsIntern workspace run. Three sources:

1. The workspace at $workspace_path — files, git history, and the actual skills/agents and methodology file the run was operating under (.claude/ + CLAUDE.md for Claude Code, .pi/ + AGENTS.md for Pi, .codex/ + AGENTS.md for Codex, .opencode/ + AGENTS.md for OpenCode).
2. The session record — every prompt, response, and tool call from the run. Single JSONL for Claude Code; main-agent JSONL plus per-skill sub-agent JSONLs for Pi; main-agent JSONL plus per-spawned-agent JSONLs for Codex; a single SQLite database (rows keyed by session, not files) for OpenCode (see Host detection and session locations below).
3. The methodology contract — the workspace's own methodology file and (.claude|.pi|.codex)/agents/ or .opencode/agents/, and (.claude/skills|skills|.agents/skills|.opencode/commands)/. These are the rules the run is being audited against. (Optional: the canonical templates in the parent commons/ and hosts/<host>/ dirs for cross-reference.)
4. Reference solution (if available) — the known-correct answer to the problem, if it exists, can be documented in references/. This is a quality check, not a methodology requirement; the audit should be honest about whether the run produced a correct, partially correct, or incorrect answer, but the main focus is on the process rather than the outcome.

The methodology promises:

1. Main agent is coordinator only — never performs substantive surveys, derivations, computations, reviews, or critiques itself.
2. research_log.md invariants: every Working Claim & Established Result lists ≥1 source; canonical section order (Open Questions → Working Claims → Established Results → Dead Ends → Conventions → Sanity Checks); Dead Ends compacted but never removed; every Open Question has a status line; every sub-agent flag dispositioned in notes/flags.md before the integration commit.
3. Robust evidence before promotion: a Working Claim becomes Established only when evidence is robust against typical failure modes (conceptual / transcription / sign-factor). Usually that means ≥2 sources from independent dispatch contexts — a single artefact's internal sym/num cross-check counts as one source for conceptual-bug protection. If only one approach is genuinely available, the reasoning must be recorded explicitly in research_log.md alongside the source list.
4. Fresh context for /review and /critique — reviewers do not read sibling review files (D-NNN_R*.md / C-NNN_R*.md) for the same target; critics receive only one-line summaries of prior critiques. (Workspaces predating 2026-05 use an in-file ## Reviews section on the target; the audit accepts either convention.)
5. Review is part of standard flow — after /derive or /compute, the next dispatch should be /review (unless trivial; batching is permitted but must be recorded in notes/flags.md).
6. Integration loop: every sub-agent return is followed by (i) research_log.md integration, (ii) per-flag disposition in notes/flags.md, (iii) any plan.md edits, (iv) one commit that bundles the artefact + main-agent edits. Sub-agents do not commit.
7. Main agent edits: research_log.md, notes/ (incl. notes/flags.md), critiques/CR-NNN.md (Resolution + status), and targeted edits to plan.md (mark done / drop / retitle / revise upcoming step). Strategy-level plan changes re-invoke /research-plan. Sub-agents own their artefacts.
8. Sub-agent return schema: both (8a) the artefact file on disk and (8b) the reply-channel message (Claude Code tool_result.content, Pi subagent return body, Codex wait_agent reply / last_task_message) carry ## Summary / ## Result / ## Flags (empty Flags rendered as - (none)). Extra sections (e.g. ## Integration actions, ## Recommended next steps) violate the schema. The two channels drift independently — usually the artefact is fine and the reply is prose. Flags are proposals; the main agent must record the disposition in notes/flags.md.
9. HITL for /research-plan (strategy-level) — the sub-agent drafts, the main agent presents to the user for approval before continuing. Targeted plan edits by the main agent do not require user approval.

Inputs

• $workspace_path (required): path to the workspace directory (e.g. /Users/david/projects/theoretical-physics/physics-agent/qec).
• $session_id (optional): UUID of the session. If omitted, auto-discover based on host (see below).

If $ARGUMENTS is empty, ask the user for the workspace path.

Host detection and session locations

First detect which host the workspace was run under by checking which methodology dir exists:

• Claude Code: <workspace>/.claude/ and CLAUDE.md present. Single main-agent JSONL at ~/.claude/projects/<encoded>/<uuid>.jsonl. Sub-agent activity (Skill forks) is journaled inline in the same JSONL.
• Pi: <workspace>/.pi/ and AGENTS.md present. Both main and sub-agent JSONLs live under ~/.pi/agent/sessions/ — main-agent at ~/.pi/agent/sessions/<encoded>/<timestamp>_<uuid>.jsonl, and per-sub-agent JSONLs nested under a sibling dir with the same basename (timestamp + uuid, no .jsonl): ~/.pi/agent/sessions/<encoded>/<timestamp>_<uuid>/<short-id>/run-N/session.jsonl (one <short-id> subdir per dispatched sub-agent, run-N for retries). Legacy Pi placed sub-agent logs at <workspace>/.pi/sessions/<skill>/run-N/ — fall back to that if the nested layout is empty. Audit both files: the main-agent shows orchestration decisions, the sub-agents show what each fork actually did. A sibling <encoded>/subagent-artifacts/ dir holds <short-id>_<agent>_<n>_{input,output,meta} triples — useful as a fast summary parallel to the JSONLs.
• Codex: <workspace>/.codex/ and AGENTS.md present. Sessions are date-organised, not workspace-organised — JSONLs live at ${CODEX_HOME:-~/.codex}/sessions/YYYY/MM/DD/rollout-<ts>-<uuid>.jsonl. Discover the main-agent session by reading the first record of candidate files and matching cwd against the workspace absolute path. Two schemas exist: current Codex (multi_agents_v2, GPT-5) uses top-level type=="response_item" / type=="event_msg" / type=="session_meta" with cwd at .payload.cwd; legacy Codex uses item.type tags (SessionMeta/FunctionCall/EventMsg) with cwd at .item.cwd. Sub-agent activity lives in separate JSONL files under the same date tree; linkage is the child UUID inside close_agent.arguments.target (current) or CollabAgentSpawnBegin.child_thread_id (legacy), which matches the child JSONL's filename suffix.
• OpenCode: <workspace>/.opencode/ and AGENTS.md present. There are no JSONL files — OpenCode keeps everything in one SQLite database at ${XDG_DATA_HOME:-~/.local/share}/opencode/opencode.db. The trajectory lives across three tables: session (one row per main agent or sub-agent; directory = workspace abs path, parent_id = the dispatching main session for sub-agents, agent = build for the main agent or the role name for a sub-agent, plus model, cost, tokens_*), message (one row per turn, data JSON carries role/modelID/tokens/finish), and part (data JSON carries type ∈ text/reasoning/tool/patch/step-start/step-finish; tool parts hold .tool, .state.status, .state.input, .state.output, .state.error). Discover by session.directory, not by project — a single workspace re-initialised N times spawns N project rows for the same path, so WHERE directory = '<abs path>' is the only robust key. Expect multiple main (build, parent_id IS NULL) sessions per run (context clears, /autoresearch restarts, resets) — the git commits are the canonical spine; union all main sessions for the directory and order by time_created.

The encoded path uses / → -. Claude Code drops the leading /; Pi preserves it with a leading -- (verify by ls ~/.pi/agent/sessions/). Codex does not encode the workspace path into the filename at all — filter by .payload.cwd (current) / .item.cwd (legacy) instead. OpenCode does not use the filesystem for sessions at all — query the SQLite session.directory column.

Auto-discovery snippet (bash)

WS="$workspace_path"
if [ -d "$WS/.claude" ]; then
  HOST=claude
  ENCODED=$(echo "$WS" | sed 's|/|-|g')
  SESSION_DIR="$HOME/.claude/projects/${ENCODED}"
  if [ -n "$session_id" ]; then
    JSONL="${SESSION_DIR}/${session_id}.jsonl"
  else
    JSONL=$(ls -t "${SESSION_DIR}"/*.jsonl 2>/dev/null | head -1)
  fi
  SUBAGENT_LOGS=""   # inline in $JSONL
elif [ -d "$WS/.pi" ]; then
  HOST=pi
  # Pi encodes the workspace path with `/` → `-` and a `--` wrap on each side
  # (e.g. `--Users-david-...-qec-pi--`). Glob rather than reconstruct.
  WS_BASENAME=$(basename "$WS")
  SESSION_DIR=$(ls -d "$HOME/.pi/agent/sessions/"*"${WS_BASENAME}"* 2>/dev/null | head -1)
  JSONL=$(ls -t "${SESSION_DIR}"/*.jsonl 2>/dev/null | head -1)
  # Current Pi nests sub-agent JSONLs under a sibling dir named after the full
  # JSONL basename (timestamp + uuid, no .jsonl extension):
  #   $SESSION_DIR/<timestamp>_<uuid>/<short-id>/run-N/session.jsonl
  SUBAGENT_LOGS_NEW="${JSONL%.jsonl}"   # full basename, including timestamp prefix
  SUBAGENT_LOGS_LEGACY="$WS/.pi/sessions"   # legacy per-skill layout
  if compgen -G "${SUBAGENT_LOGS_NEW}/*/run-*/session.jsonl" >/dev/null 2>&1; then
    SUBAGENT_LOGS="${SUBAGENT_LOGS_NEW}"   # contains <short-id>/run-N/session.jsonl
  else
    SUBAGENT_LOGS="${SUBAGENT_LOGS_LEGACY}"  # contains <skill>/run-N/session.jsonl
  fi
elif [ -d "$WS/.codex" ]; then
  HOST=codex
  # Codex sessions are date-organised under ~/.codex/sessions/YYYY/MM/DD/
  # — not keyed by workspace. Filter all candidates by cwd, then pick the most
  # recently-modified. Current schema puts cwd at .payload.cwd; legacy at .item.cwd.
  SESSION_ROOT="${CODEX_HOME:-$HOME/.codex}/sessions"
  if [ -n "$session_id" ]; then
    JSONL=$(find "$SESSION_ROOT" -name "*${session_id}*.jsonl" 2>/dev/null | head -1)
  else
    matches=$(find "$SESSION_ROOT" -name "rollout-*.jsonl" 2>/dev/null | while read -r f; do
      cwd=$(head -1 "$f" 2>/dev/null | jq -r '.payload.cwd // .item.cwd // empty' 2>/dev/null)
      [ "$cwd" = "$WS" ] && echo "$f"
    done)
    JSONL=$(printf '%s\n' "$matches" | xargs ls -t 2>/dev/null | head -1)
  fi
  # Sub-agent JSONLs are discovered from spawn/close events in the main JSONL
  # (each carries a child UUID matching the per-child filename suffix).
  SUBAGENT_LOGS="$SESSION_ROOT"
elif [ -d "$WS/.opencode" ]; then
  HOST=opencode
  # OpenCode stores everything in one SQLite DB — there is no JSONL. Discovery
  # is a SQL query on session.directory, NOT filesystem globbing.
  OC_DB="${XDG_DATA_HOME:-$HOME/.local/share}/opencode/opencode.db"
  JSONL=""              # not applicable; use $OC_DB
  # Sanity: confirm the workspace has sessions in the DB.
  sqlite3 "$OC_DB" "SELECT count(*) FROM session WHERE directory='$WS';" 2>/dev/null
fi

If $JSONL is missing or empty (or, for OpenCode, $OC_DB is absent or has no rows for $WS), do the analysis from the workspace + git history alone and note the gap in the report. For Pi, also enumerate $SUBAGENT_LOGS/*/run-*/session.jsonl since those exist independently of the main-agent JSONL.

Procedure

Execute in order. Use jq, grep, git, and Read liberally.

Step 1 — Sanity checks and scope

• Confirm $workspace_path exists and contains problem.md plus the host's methodology file: CLAUDE.md + .claude/ for Claude Code, AGENTS.md + .pi/ for Pi, AGENTS.md + .codex/ for Codex, or AGENTS.md + .opencode/ for OpenCode.
• Read the workspace's methodology file and the agent prompts ((.claude|.pi)/agents/*.md Markdown, .codex/agents/*.toml TOML, .opencode/agents/*.md Markdown) and the skill/command prompts ((.claude/skills|skills|.agents/skills)/*/SKILL.md, or .opencode/commands/*.md for OpenCode) — these are the actual prompts the run was using. The audit's contract is what these say, not what the canonical drafts say. Note any divergence from the canonical drafts.
• Size the transcript: wc -l "$JSONL" (Claude/Pi/Codex). For OpenCode, count rows instead: sqlite3 "$OC_DB" "SELECT count(*) FROM part WHERE session_id IN (SELECT id FROM session WHERE directory='$WS');". If huge, plan to sample.
• Capture run shape: number of artefacts, number of commits, wall-clock from first to last JSONL timestamp.

Step 2 — Trajectory reconstruction

The schema differs by host — pick the right extractor.

Claude Code. Tool calls are top-level events with type=="tool_use"; sub-agent dispatches use name=="Skill"; results are separate tool_result events. Sub-agent activity (Reads, Edits, etc. inside the fork) is journaled inline in the same JSONL.

jq -c 'select(.type=="assistant" or .type=="user" or .type=="tool_use" or .type=="tool_result") | {type, ts:.timestamp, name:.tool_name, inp:.tool_input, out:.tool_result}' "$JSONL" > /tmp/events.jsonl

For each tool_use with name=="Skill": capture dispatch_ts, skill name, $ARGUMENTS, the matching tool_result return_ts and content.

Pi. Tool calls are nested inside message events: .message.content[].type == "toolCall". Sub-agent dispatches use name == "subagent", with .arguments.tasks[].agent (e.g. surveyor, deriver), .arguments.tasks[].task (the dispatch brief), and .arguments.sessionDir (relative path to the per-skill sub-agent JSONL, e.g. .pi/sessions/survey). The sub-agent's full activity log is in that per-skill JSONL, not in the main-agent JSONL.

# Main-agent dispatches
jq -c 'select(.type=="message") | .message.content[]? | select(.type=="toolCall" and .name=="subagent")' "$JSONL" > /tmp/dispatches.jsonl

# For each dispatch, the sub-agent journal is at $WS/<sessionDir>/run-0/session.jsonl
# (or run-1, run-2 for retries — list them)

For each Pi subagent call: capture dispatch_ts (from the enclosing message), agent name, task body, and read the per-skill session.jsonl ($SUBAGENT_LOGS/<basename>/run-*/session.jsonl) for the full sub-agent trajectory and the structured return.

Codex. Two schemas exist — sniff before extracting:

jq -r '.type // .item.type' "$JSONL" 2>/dev/null | sort -u | head

If the top-level keys are response_item / event_msg / session_meta (lowercase tagged), the run is on current Codex (multi_agents_v2, GPT-5). If they're SessionMeta / FunctionCall / EventMsg (PascalCase under .item.type), it's legacy Codex — fall through to the legacy jq at the bottom.

Current schema. Main-agent tool calls split across two payload.type values:

• function_call — used by exec_command, spawn_agent, wait_agent, close_agent, and a few others.
• custom_tool_call — used by apply_patch (a freeform Lark-grammar tool, distinct from function_call).

The current tool inventory in commons/ / hosts/codex/ exposes essentially: exec_command (shell — Codex's only file-read primitive, used via sed -n, cat, rg, ls, find, git), apply_patch (the dedicated edit tool), and the spawn_agent / wait_agent / close_agent triple for sub-agent orchestration. There is no native read_file / edit_file / write_file / grep / glob — every file read is a shell call.

# All main-agent tool calls (both payload kinds)
jq -c 'select(.type=="response_item" and (.payload.type=="function_call" or .payload.type=="custom_tool_call"))
       | {ts:.timestamp, name:.payload.name, kind:.payload.type, args:.payload.arguments}' "$JSONL" > /tmp/calls.jsonl

# Sub-agent dispatch lifecycle (spawn / wait / close)
jq -c 'select(.type=="response_item" and .payload.type=="function_call"
              and (.payload.name=="spawn_agent" or .payload.name=="wait_agent" or .payload.name=="close_agent"))' "$JSONL" > /tmp/dispatches.jsonl

# For each close_agent, the child UUID locates the per-agent JSONL:
#   target=$(echo "$args" | jq -r '.target')
#   find "${CODEX_HOME:-$HOME/.codex}/sessions" -name "*${target}*.jsonl"

Legacy schema (older Codex builds). Each line is {timestamp, item} with item.type in FunctionCall / FunctionCallOutput / EventMsg. Sub-agent dispatches appear as EventMsg items with msg.type in CollabAgentSpawnBegin / CollabAgentSpawnEnd etc., carrying the child thread_id. The current jq above will return nothing on legacy — use:

jq -c 'select(.item.type=="FunctionCall") | {ts:.timestamp, name:.item.name, args:.item.arguments}' "$JSONL" > /tmp/calls.jsonl
jq -c 'select(.item.type=="EventMsg" and (.item.msg.type | startswith("CollabAgent")))' "$JSONL" > /tmp/dispatches.jsonl

OpenCode. No JSONL — query the SQLite store. Open it read-only (mode=ro&immutable=1) and parse the JSON columns with Python (sqlite3's CLI mangles multi-line JSON). The session tree is explicit: main sessions are parent_id IS NULL, sub-agents are parent_id = <main session id>, so linkage needs no UUID matching (unlike Codex). Sub-agent dispatches also appear in the main session as part.data.type=="tool" with tool=="task" — state.input.subagent_type is the role, state.input.description the task slug, and state.status is completed or error (OpenCode surfaces dispatch errors here).

import sqlite3, json, os
WS = os.environ["WS"]
db = os.path.expanduser(os.environ.get("OC_DB", "~/.local/share/opencode/opencode.db"))
con = sqlite3.connect(f"file:{db}?mode=ro&immutable=1", uri=True); con.row_factory = sqlite3.Row

sessions = list(con.execute(
    "SELECT id,parent_id,agent,title,model,cost,tokens_output,time_created "
    "FROM session WHERE directory=? ORDER BY time_created", (WS,)))
mains = [s for s in sessions if not s["parent_id"]]          # the build sessions (often >1)

def parts(sid):                                              # ordered trajectory for a session
    return [json.loads(r["data"]) for r in con.execute(
        "SELECT data FROM part WHERE session_id=? ORDER BY time_created", (sid,))]

def tools(sid):                                             # (tool, status, error) per tool call
    out = []
    for d in parts(sid):
        if d.get("type") == "tool":
            st = d.get("state", {}) or {}
            out.append((d.get("tool"), st.get("status"), st.get("error")))
    return out

def dispatches(main_id):                                    # Task calls made by a main session
    for d in parts(main_id):
        if d.get("type") == "tool" and d.get("tool") == "task":
            inp = (d.get("state", {}) or {}).get("input", {}) or {}
            yield inp.get("subagent_type"), inp.get("description"), (d.get("state") or {}).get("status")

The dispatch return the main agent integrates is the sub-agent session's final assistant text (the ## Summary / ## Result / ## Flags block) — extract it as the last part.data.type=="text" of the child session. The model is session.model (JSON) or message.data.modelID; record it, because on OpenCode model quality dominates sub-agent reliability (see the empty-turn heuristic below). To map a child session to its artefact, match its agent + title (e.g. deriver / "derive D-001 …") and the files written (tool=="write"/"edit" parts) against the committed D-NNN.md.

For all hosts, for each sub-agent return:

• Wall-clock = return_ts - dispatch_ts.
• Was the return the canonical ## Summary / ## Result / ## Flags schema, or did it invent sections?
• Identify main-agent activity between this return and the next skill dispatch: which files were edited, which user messages came in, which AskUserQuestion fired.

Produce a numbered trajectory table.

Step 3 — Commit discipline

cd "$WS" && git log --all --pretty='%h %ai %s'
git status --porcelain

For each skill invocation in step 2: was there a commit between dispatch_ts and return_ts (or shortly after) that touched the expected artefact (e.g. survey.md for /survey, derivations/D-NNN.md for /derive, etc.)? Build a table:

Skill	Expected artefact	Commit?	Files left uncommitted

End-of-run git status is the ground truth for which files are uncommitted. Any non-empty entry there is a finding.

Step 4 — Methodology adherence (rule-by-rule)

For each rule above (Rule 8 split into 8a artefact + 8b reply channel — 10 checks total), decide pass / partial / fail with specific evidence. Don't be charitable. Cite JSONL line numbers (or jq queries) and commit hashes.

Mechanical checks:

• Rule 1 (coordinator-only): count main-agent tool calls by type. Flag any main-agent Write/Edit to derivations/, computations/, critiques/CR-NNN.md ## Findings, survey.md, answer.md. Also scan main-agent text turns for inline derivations or substantive maths/code — heuristic: text turn with multiple equations not framed as quoted sub-agent output. Tool-count caveat: raw tool counts are not comparable across hosts — Claude Code has dedicated Read/Edit/Write, Pi has structured read/edit/write, OpenCode has native read/edit/write/bash/glob/grep (so its counts are comparable to Claude/Pi), Codex has only exec_command + apply_patch (so every file read is a sed -n shell). For Codex, classify each exec_command by command stem (sed/cat/rg/find/ls/git/mkdir/python/curl) before counting — a git commit and a sed -n view are not the same logical operation. For OpenCode, the main agent is itself an OpenCode session (agent=='build'); its tool parts are queried the same way as any other session. Report both the raw count and the normalised count of logical operations (file-reads, file-writes, sub-agent dispatches, commits, HITL prompts).
• Rule 2 (research_log invariants): parse the final research_log.md. Check:
  • Canonical section order.
  • Every W- and E- entry has a sources: line.
  • Every Open Question has a status line.
  • Dead Ends section never shrank across commits (git log -p -- research_log.md | grep -c "Dead End" over time should be monotonic non-decreasing).
  • notes/flags.md exists and contains a disposition for every sub-agent flag returned during the run (cross-check against step 5).
• Rule 3 (robust evidence before promotion): for each ER, extract cited sources and group by dispatch context — two paths inside the same C-NNN.md artefact count as one. An ER with all sources in one dispatch context is flagged UNLESS the entry explicitly records why only one approach is available. The audit should not be charitable about this: vague "no other method available" without a stated reason → still a finding.
• Rule 4 (fresh-context for /review and /critique): spot-check the dispatch argument passed to /review. Did it include prior reviews of the same target (the target's ## Reviews section in legacy workspaces, or any sibling _R*.md file in current workspaces)? It should not. For /critique, were only one-line summaries of prior critiques passed (not full bodies)?
• Rule 5 (review-after-derive/compute): for every D-NNN.md and C-NNN.md, check that at least one of the following holds: (i) a ## Reviews heading exists in the target (legacy convention), or (ii) a sibling D-NNN_R*.md / C-NNN_R*.md file exists (current convention). Missing both → flag with the artefact ID. If review was batched (multiple /derive or /compute before /review), check notes/flags.md for the recorded reasoning.
• Rule 6 (integration loop / commits): tally from step 3. Each skill invocation should produce one commit that bundles the sub-agent's artefact, the research_log.md update, the notes/flags.md dispositions, and any plan.md edits. Missing commits, or commits that touch only the artefact without the main-agent edits, → flag.
• Rule 7 (main-agent edit scope): parse all main-agent Edit/Write tool calls. Allowed paths: research_log.md, notes/* (incl. notes/flags.md), critiques/CR-NNN.md (Resolution/status only — not the original findings), plan.md (targeted edits: mark done, drop, retitle, revise upcoming step). Edits to derivations/ (incl. D-NNN_R*.md review files), computations/ (incl. C-NNN_R*.md), survey.md, answer.md, legacy ## Reviews sections in target files, or wholesale rewrites of plan.md → finding.
• Rule 8a (artefact schema): every artefact file (survey.md, D-NNN.md, C-NNN.md, D/C-NNN_R*.md, CR-NNN.md, answer.md) should match the agent's declared heading structure — usually ## Summary / ## Result / ## Flags (critiques: ## Findings / ## Resolution). Extra sections (## Recommended next steps, etc.) are findings. Check by grep -E '^## ' <artefact>.
• Rule 8b (reply-channel schema): the sub-agent's reply message — the body the main agent actually sees inline as the dispatch return — should also be the canonical ## Summary / ## Result / ## Flags block, not a narrative summary. Locations: Claude Code → tool_result.content in the main JSONL; Pi → the subagent tool's return body (also visible at the head of the per-sub-agent session.jsonl); Codex → the wait_agent reply / last_task_message; OpenCode → the child session's final text part (and mirrored in the parent's task tool state.output). Schema drift on 8b is independent of 8a — artefacts are usually fine; replies are where drift lives, and it causes flags to be silently dropped because the main agent integrates from the reply, not the file. Empty Flags should be ## Flags\n- (none)\n, not omitted.
• Rule 9 (HITL for /research-plan): between a strategy-level /research-plan return and the next non-research-plan skill dispatch, look for AskUserQuestion, user message, or main-agent text presenting the plan for approval. Missing → flag. Targeted plan edits by the main agent (not via /research-plan) do not require approval; do not flag those.

Step 5 — Flag-disposition trace

For every sub-agent return that contained a ## Flags block:

• Extract each flag (one bullet per flag).
• Primary check: is there a corresponding line in notes/flags.md? The canonical disposition record is: [skill][artefact-id] <flag summary> → accepted/dismissed/deferred (one-line reason)
• Verify the disposition matches subsequent main-agent activity within ~5 minutes / before next skill dispatch:
  • accepted → a research_log.md edit, a follow-up skill dispatch, or a notes/* file created.
  • dismissed → reason in the notes/flags.md line is sufficient; no further action needed.
  • deferred → reason names what's being waited on or when to revisit.
• Flags with no entry in notes/flags.md → finding ("silently dropped"), regardless of any incidental activity afterwards.

If notes/flags.md is missing entirely, that is itself a finding — init-physics-intern seeds it, and the integration loop mandates its use.

Step 6 — Prompt-vs-behaviour delta

Compare what the workspace's agent prompts ((.claude|.pi|.opencode)/agents/*.md Markdown, .codex/agents/*.toml TOML) and skill/command prompts ((.claude/skills|skills|.agents/skills)/*/SKILL.md, or .opencode/commands/*.md) claim against what actually happened:

• For each agent's declared tools: list: did the sub-agent run any tool outside that list? (Possible — Claude Code may not strictly enforce.) Note for each agent. N/A for Codex and OpenCode, whose roles carry no per-agent tools allowlist (Codex is sandbox-scoped; OpenCode relies on the file-ownership prose), so there is no list to violate — skip this bullet for them.
• For each agent's declared artefact heading structure (e.g. "writes ## Derivation"): does the produced artefact actually use those headings? Mismatches are findings.
• For each agent's "Do NOT" constraints: any violations?
• For each agent's "report back via ## Flags rather than expanding scope": any cases where the sub-agent silently expanded scope (Read other artefacts, browsed references/)?
• Brief priors-leakage (main-agent side): scan the dispatch briefs (the $ARGUMENTS / task / prompt body the main agent passes to /derive, /compute, /review, /critique) for explicit numeric targets ("This should give 16/25"), pre-stated sub-claim values ("Sub-claim: u_1 = 7"), or worked hints. The sub-agent is supposed to discover those independently — pre-stating them defeats the cross-check. This is distinct from Rule 4 (leaking prior reviews); this leaks author-supplied priors. Flag with the brief file path or JSONL event ID and quote the offending line.

Step 7 — Substantive quality (lighter pass)

• Does answer.md exist? Does it cite ER IDs inline? Does it name assumptions and sanity checks?
• Cross-check research_log.md ER citations against actual artefact files: grep -E 'D-[0-9]+|C-[0-9]+' research_log.md → does each cited file exist? Open it; does its # Task match the claim?
• Reconcile plan.md final state with research_log.md: completed plan steps should map to ERs or Dead Ends; dropped steps should have a stated reason.
• Note if any unresolved critique findings (status: pending in critiques/) bear on the answer.

Step 8 — Compile the report

Write to /tmp/audit-<workspace-basename>.md. Structure:

# <Workspace> Run Post-Mortem

## Run shape
<wall-clock; # skill invocations; # commits; # artefacts; headline judgement (substantive answer correct/partial/wrong)>

## Trajectory
<numbered list with timestamps, dispatch args, return summary, integration actions>

## Methodology adherence
<table: rule → pass/partial/fail with evidence>

## Prompt-quality issues
<numbered findings; each with file:line, current text, observed behaviour, proposed fix>

## Workflow observations

### Per-dispatch wall-clock

| # | Skill | Agent | Dispatched at | Returned at | Duration | Artefact |
|---|---|---|---|---|---|---|

### Main-agent tool inventory

Report logical operations (comparable across hosts) and raw tool calls (host-dependent) separately.

| Logical operation | Count |
|---|---|
| Sub-agent dispatches | |
| File reads | |
| File writes/edits | |
| Commits | |
| Shell (other) | |
| HITL prompts | |

| Raw tool / command stem | Count | Notes |
|---|---|---|

### Backtracks, retries, recoveries
<list any: deriver re-runs, apply_patch retries, `close_agent` thread-limit recoveries, HITL clarifications, sub-agent timeouts, and (OpenCode) **empty-turn dispatch failures** — sub-agent sessions that read their inputs but produced no artefact and were re-dispatched. Count the churn (e.g. "deriver dispatched 4× before D-001 was written") and attribute it: a weak model is the usual cause, and the main agent's detect-and-re-dispatch is the methodology self-healing, not a defect.>

## Substantive quality
<short prose: does answer.md actually answer problem.md; are artefacts well-formed>

## Recommended fixes (prioritised)
1. <highest impact, with specific files to edit>
2. ...

Then return a tight summary (under 800 words) to the caller covering:

• Headline verdict (substantive correctness + methodology score)
• Top 5 findings with evidence anchors
• Top 5 recommended fixes
• Anything systemic (e.g. "the heading-slice spec is fiction" applies across multiple sub-agents)

Heuristics to bake in

• "Did not commit per integration loop" = no commit between dispatch_ts and return_ts (or within ~30s after) that touches both the expected artefact AND the main-agent integration edits (research_log.md, notes/flags.md, optionally plan.md).
• "Flag silently dropped" = a flag returned in a ## Flags block has no corresponding line in notes/flags.md. Subsequent incidental activity does not redeem it; the disposition record is the canonical signal.
• "Single-context ER" = the union of cited artefact files spans ≤1 dispatch context, AND the entry does not record an explicit "only one approach available because …" reason. Multiple paths inside one C-NNN.md or one D-NNN.md is still one context.
• "Missing review" = an ER-cited source artefact (D-NNN.md or C-NNN.md) has neither a ## Reviews heading (legacy) nor any sibling _R*.md file (current).
• "Scope expansion" = a sub-agent Read a file outside its dispatch (grep the JSONL for Read tool calls inside the fork; cross-check against what was named in the dispatch).
• "Artefact schema drift" (Rule 8a) = the on-disk artefact file (D-NNN.md, etc.) contains sections outside the agent's declared schema, or is missing the canonical ## Summary / ## Result / ## Flags block.
• "Reply-channel schema drift" (Rule 8b) = the sub-agent's reply message (what the main agent sees inline as the dispatch return) is narrative prose without ## Summary / ## Result / ## Flags headers — even when the on-disk artefact is canonical. Most common on Codex (wait_agent reply) and on long-artefact returns in Claude Code. Causes flags to be silently dropped because the main agent integrates from the reply, not the file.
• "Brief priors-leakage" = the main agent's dispatch brief pre-states the expected answer numerically ("This should give 16/25") or names a sub-claim's value. Distinct from Rule 4 — Rule 4 is about leaking prior reviews; this is leaking author-supplied priors.
• "Empty-turn dispatch failure" (OpenCode) = a sub-agent session (part rows show completed reads) that ends with a near-zero-output final assistant turn and zero write/edit tool calls, so no artefact lands on disk and the main agent re-dispatches. Detect it as: child session with tokens_output ≈ a few hundred, no tool=='write'/'edit' parts, and a sibling re-dispatch of the same role/target minutes later. It is a model-reliability signature (weak models stall after reading instead of proceeding to write), not a permissions or prompt bug — confirm write works elsewhere in the same run before blaming config. Report the churn count and the model (session.model); the fix is "use a stronger model," not a prompt edit.
• "Split run across sessions/projects" (OpenCode) = the same workspace has multiple project rows (one per re-init) and/or multiple main (build) sessions (context clears, /autoresearch restarts). This is expected, not a finding — reconstruct by session.directory and treat the git commits as the canonical spine. Note it so per-session wall-clocks aren't mistaken for the whole run.

Constraints

• Be evidence-anchored. Cite file paths, line numbers, JSONL events, commit hashes. Findings without evidence are useless.
• Don't be charitable. A "soft" violation is still a violation; flag it as partial rather than passing.
• Don't propose generic fixes ("be more rigorous"). Propose specific edits to specific files with the current text and the replacement.
• Stateless and idempotent — runnable any time, any workspace + session JSONL pair. Do not edit the workspace, the JSONL, or any global files. Only write to /tmp/audit-*.md.
• Honest about gaps. If the session record is missing or truncated — a missing/truncated JSONL, or (OpenCode) an opencode.db with no rows for the workspace directory — say so and report only what the workspace + git can tell you.

Tools required

Read, Bash (for jq, grep, git, wc, ls, and sqlite3 + python3 for the OpenCode store), Write (only to /tmp/).