Use when finding past Claude Code conversation threads — across every project and every config dir on this machine — to hand selected ones to /analyze-thread for failure analysis. Scans the projects/ tree of each config dir, keeps threads that did agentic work (edited code, ran a skill, or spawned a subagent — so read-only review/debug/investigate runs are included), tags each edited or read-only, and either lists them grouped by project or, when you pass a query, searches inside the thread bodies (PR number, error string, filename, or a topic phrase) and ranks the matches. Pass --code-only to restrict to code-editing threads. Takes a free-text pick. Skip for analyzing one already-known thread file (call /analyze-thread directly) or live debugging (/geniro:debug).
Installation
Install with Codex or Claude Copy this prompt, paste it into Codex, Claude, or another assistant, and let it review the skill page and install it for you.
Use when finding past Claude Code conversation threads — across every project and every config dir on this machine — to hand selected ones to /analyze-thread for failure analysis. Scans the projects/ tree of each config dir, keeps threads that did agentic work (edited code, ran a skill, or spawned a subagent — so read-only review/debug/investigate runs are included), tags each edited or read-only, and either lists them grouped by project or, when you pass a query, searches inside the thread bodies (PR number, error string, filename, or a topic phrase) and ranks the matches. Pass --code-only to restrict to code-editing threads. Takes a free-text pick. Skip for analyzing one already-known thread file (call /analyze-thread directly) or live debugging (/geniro:debug).
context
main
model
inherit
allowed-tools
["Read","Bash","Glob","Grep","AskUserQuestion"]
argument-hint
[search query — PR number / phrase / filename — or empty for all] [--code-only]
/find-threads — Discover work-bearing Claude threads and hand them to /analyze-thread
You are the orchestrator for finding past Claude Code conversation threads that did substantive agentic work and routing the ones the user picks to the existing /analyze-thread skill. The sibling scan.py enumerates every project's session logs across all config dirs, keeps threads that edited code OR ran a skill OR spawned a subagent (tagging each edited or read-only, so read-only review/debug/investigate runs are surfaced too), and — when the user passes a query — searches inside the thread bodies and ranks the matches. You present the survivors, take a free-text selection, then launch /analyze-thread on the first pick and print the rest as a ready-to-run queue. You only READ session logs — you never modify them, and you never edit /analyze-thread.
Input: an optional query and/or the --code-only flag in $ARGUMENTS.
Empty → list every work-bearing thread (edited + read-only), grouped by project.
A query (e.g. 2649, bright data, case-radar.ts, didnt post low) → keep only threads whose body, title, or project path matches, ranked best-first. See Searching by content below for what to type.
--code-only → restrict the result set to code-editing threads (the legacy behavior); combines with a query.
Output: a titled list of threads, each tagged edited or read-only, + (on the user's pick) a launched /analyze-thread <path> --format=jsonl directive for the first selection and a runnable queue for the rest.
Phases
Discover — run scan.py. It enumerates every *.jsonl session log under each config dir's projects/, keeps threads that did agentic work — an edited thread calls a code-edit tool (Edit / Write / MultiEdit / NotebookEdit); a read-only thread spawns a subagent or invokes a Skill but never edits code — and for each survivor extracts its kind, a title, the true project label, the date, a turn count, and an oversize flag. --code-only drops the read-only threads. With a query it also scores each thread by content match and drops non-matches.
Present — render the survivors. No query → grouped by project, newest-first. A query → one flat list ranked best-first, each row showing its project, date, title, kind (edited/read-only), a match indicator, and a snippet. Number every shown row.
Select & launch — take a free-text reply (1,4,7 / 1-5 / all), resolve it to absolute paths, echo the set for confirmation, then launch /analyze-thread <first> --format=jsonl and print the remaining picks as a runnable queue.
Loop invariants
Read-only on session logs. This skill only reads thread files; it writes nothing and never edits /analyze-thread. The downstream /analyze-thread is also read-only on the thread it analyzes.
--format=jsonl on every launched command. Every current session log begins with a line like {"type":"last-prompt"…} / {"type":"queue-operation"…} — none begin with {"type":"summary|user|assistant"}, so /analyze-thread's format sniff would misread them as markdown. Forcing --format=jsonl skips the sniff and is mandatory on the launched command and every queued command.
Free-text selection, not a multiSelect question. A single project can hold well over a hundred threads; an AskUserQuestion caps at 4 options, so one-option-per-thread cannot present them. Selection is a numbered chat list plus a free-text reply, parsed and echoed back. The only AskUserQuestion is the lean launch-confirmation gate (3 options).
Project label comes from the thread's cwd, not the folder name. Decoding the projects/<encoded> folder name by turning - into / corrupts labels for projects with literal hyphens (e.g. claude-plugin). scan.py reads the true path from the JSONL cwd field instead.
English-only skill body. Thread titles are runtime data and may contain any language — render them as-is in the list. The skill body itself stays English-only.
Scan every config dir, not just ~/.claude/. A thread's session logs live under whichever config dir was active when it ran. scan.py scans ~/.claude/projects, $CLAUDE_CONFIG_DIR/projects when that env var is set, and every path in its EXTRA_ROOTS list — so a thread under a second config dir is never invisible. Add a new config dir to EXTRA_ROOTS in scan.py once.
Search returns ranked candidates; you disambiguate the top few.scan.py ranks by term proximity, not certainty. A worktree dir named pr-2649 mentions that number without being the PR-2649 review. Before presenting or launching a query result, confirm the top candidates are what the user means — check which skill actually ran, or that a real PR reference is present — rather than trusting rank #1 blindly.
Budgets & caps
Budget
Value
Why
List wall-clock
a few seconds typical; ~10s on a years-deep multi-config tree
An edited thread short-circuits on the first code-edit; a read-only thread is confirmed only after the full signal-cap scan finds no edit, so it is the costlier classification — still bounded by the signal-scan cap
Search wall-clock
~5–10s
A query reads up to 12 MB of each thread's body to score matches; bounded so a 60 MB log can't dominate
Title scan window
first 2 MB of each file
The embedded ai-title line can sit ~1.5 MB into a large log; 2 MB captures it while bounding work
Body search window
first 12 MB of each file
Covers the vast majority of logs whole; a match deeper than 12 MB in a giant log may be missed (acceptable — one early hit still surfaces the thread)
List display cap
newest 10 per project, with "show more"
Past ~10 rows per project the list becomes unscannable; the rest expand on request
Search display cap
top 15 ranked, with "show more"
A common-word query can match every thread; ranking floats the real matches up, so show the best 15 and expand on request
Oversize flag
mark threads > 5 MB
/analyze-thread rejects files over its 5 MB hard cap, so flag them rather than silently queueing a command that will be refused
ACI per-phase tool surface
Phase
Tools used
Notes
1 Discover
Bash (python3 scan.py)
One process produces the row list (list or ranked-search)
2 Present
(orchestrator inline)
No tools — render the rows into tables
3 Select & launch
AskUserQuestion, Read
AUQ for the launch-confirmation gate; Read only if previewing a thread before launch
PHASE 1: DISCOVER
Run the sibling engine. SKILL_DIR is this skill's base directory — the absolute path shown in the invocation header (Base directory for this skill: …).
# Empty (list mode), a query (search mode), and/or --code-only — all passed through verbatim.
python3 "${SKILL_DIR}/scan.py"$ARGUMENTS
It prints one tab-separated row per surviving thread:
kind: edited (calls a code-edit tool) or read-only (spawns a subagent / invokes a Skill but never edits code). --code-only keeps only edited.
List mode (relevance=hits=0, snippet empty): sorted by project, then newest-first.
Search mode: kept only when the query matches the body, title, or label; relevance = how many query terms co-occur within one ~160-char window (proximity), hits = total term occurrences, snippet = cleaned text around the densest match. Sorted relevance-desc, hits-desc, newest.
Why scan.py, not a shell grep/jq pipeline:
grep skips .jsonl logs that embed base64 images as "binary" unless forced with -a, silently dropping real threads. A single Python read+search never does.
The macOS zsh sandbox strips PATH inside | while / for in $(...) loop bodies, so a per-file shell loop loses cut/head/awk mid-run. One Python process has no inner shell loops to break.
Proximity ranking and snippet extraction are trivial in Python and painful in shell.
Every parsing guard (true cwd label, 2 MB title window, first-real-prompt fallback, oversize flag, multi-root scan, PR-number handling, the edited/read-only classification) lives in scan.py — read its module docstring before changing search behavior.
If the engine prints nothing, no work-bearing threads matched (or the query / --code-only excluded them all) — tell the user, name the query if any, and stop.
Searching by content
Type the most distinctive token you remember from the thread. Distinctive beats descriptive — the engine matches text that is literally in the thread, not your after-the-fact summary of it.
You remember…
Type
Why it works
the tracker ticket
CI-317 or CI317
An issue key matches separator-insensitively — CI-317, CI317, CI 317 all find the canonical hyphenated spelling threads use. Type it however you remember it; the hyphen is optional
the PR it reviewed
2649
A bare 3–6 digit query is read as a PR reference (pull/2649, #2649, pr-2649), so it ignores the same digits buried in UUIDs, token counts, and timestamps
an error or log string
ECONNREFUSED or null pointer
Rare strings match few threads — high precision
a file it edited
case-radar.ts
Filenames appear verbatim in edit-tool calls
only the topic
bright data / rls roles
Multi-word queries rank by proximity — threads where the words cluster outrank threads where a common word merely appears scattered
Tips:
A vague paraphrase (didnt post low) matches loosely — every thread containing "post" or "low" is kept, and ranking does the work. Prefer a PR number or a unique token when you have one.
Multiple words are OR-matched for recall but ranked by how tightly they co-occur, so the real match usually lands in the top few even amid many loose matches.
Finding a whole feature, not one thread. A single ticket key only finds threads that name that ticket. But a feature's real work-in-progress is spread across sibling tickets, follow-up PRs, and threads titled after the feature (not the key) — so one key shows fragments, never the whole epic. To assemble the complete chain, pass several terms at once: the feature noun plus the sibling keys — CI-315 CI-316 CI-317 cw_case. The terms are OR-matched into one ranked list, with threads touching several of them floated to the top by proximity. When a user asks for "all the work on X" and a single key returns a thin set, widen to a multi-term query before concluding the work isn't there.
PHASE 2: PRESENT
List mode (no query)
Rows arrive sorted by project then newest-first. Walk them top to bottom; start a new project block when project_label changes.
Number every kept row first, across the whole list. Assign global numbers 1, 2, 3, … N before hiding anything. Each thread keeps its number whether or not it is shown, and the next project continues the count past the previous project's FULL row count (if project A has 45 threads, project B's first shown row is #46, even though only #1–10 of A are visible).
## Threads — <N> across <M> projects (<E> edited, <R> read-only)
### <project name> (<full path>)
1. <date> <title> (<turns> turns)
2. <date> <title> [read-only] [>5 MB] (<turns> turns)
...
10. <date> <title> [read-only] (<turns> turns)
… +<K> more in this project (#11–<last>) — reply "more <project name>" to reveal them
Rules:
Numbers are assigned once across the full kept set and never change. Show the newest 10 rows per project; hidden rows keep their already-assigned numbers and are revealed, not renumbered, on more <project name>.
Tag read-only rows with [read-only]; edited rows carry no tag (they are the common case, so tagging only the minority keeps the list scannable).
Mark oversize rows with [>5 MB] and note once that /analyze-thread refuses files over 5 MB.
Keep titles on one line (already truncated to ~100 characters).
Search mode (a query)
Rows arrive ranked best-first across all projects. Present ONE flat list (relevance ordering beats project grouping when the user is hunting a specific thread). Number the shown rows 1…N.
## Threads matching "<query>" — top <shown> of <total>
1. <date> <title> [read-only] [<project name>] (<turns> turns) <match indicator>
↳ <snippet>
2. ...
… +<K> more — reply "more" to reveal the rest (lower-ranked)
Rules:
Show the top 15; reveal the rest on more. A common-word query can match every thread — say so (<total> matched) so the user knows ranking, not exclusion, is in play.
Include the snippet so the user can tell matches apart at a glance.
Tag read-only rows with [read-only]; edited rows carry no tag. The kind is load-bearing when the user is hunting a pipeline run (a read-only /geniro:review is exactly an /analyze-thread target).
Before presenting, sanity-check the top candidates against what the user asked for (invariant #7) — e.g. if they want a /review run, confirm the rank-#1 thread actually ran that skill, not merely mentions the PR. Note any candidate you down-rank and why.
Mark oversize rows with [>5 MB].
If the list is empty, say no work-bearing threads matched (name the query) and stop.
PHASE 3: SELECT & LAUNCH
Step 1 — Take the selection
Ask the user to reply in free text. Accept:
a comma list: 1,4,7
a range: 1-5
a mix: 1-3,8,11
all — every thread in the list (after any active query)
Parse the reply against the numbered list, resolve each number to its absolute path, and drop any number outside the list (note which were ignored).
Step 2 — Confirm
Echo the resolved set back as a short list (#, title, path) so the user sees exactly what will run. Then fire ONE AskUserQuestion:
Header: "Launch analysis"
Question: "Launch /analyze-thread on these N threads? The first launchable one runs now; the rest print as a queue you can run one at a time."
Options:
"Launch — first now, rest queued (Recommended)"
"Let me re-pick" — return to Step 1
"Cancel" — stop, change nothing
If any selected thread is oversize (>5 MB), name those here and warn that /analyze-thread rejects them as-is — Step 3 keeps them out of the runnable queue.
Step 3 — Launch the first, queue the rest
On "Launch", split the selection into launchable (≤5 MB) and oversize (>5 MB) picks.
Launch the FIRST launchable pick now as a chat slash-command directive (the same sibling-launch pattern /analyze-thread itself uses for /improve-template — a slash command in chat, not a subagent):
Then print the remaining launchable picks as a fenced, runnable queue — one per line, each carrying --format=jsonl:
Queued — run these one at a time after the first finishes:
/analyze-thread <abs-path-2> --format=jsonl
/analyze-thread <abs-path-3> --format=jsonl
List any oversize picks separately under "Too large to analyze as-is (over 5 MB — split first)" with their paths — do NOT put them in the runnable queue, because /analyze-thread refuses them at its 5 MB cap and the command would just fail. If every pick is oversize, launch nothing and say so, naming the oversize threads.
--format=jsonl is on every command for the reason in invariant #2. Do not batch multiple threads into one /analyze-thread call — it takes exactly one thread path per run.
Modifier handling
$ARGUMENTS
Effect
empty
List every work-bearing thread (edited + read-only) across all config dirs, grouped by project.
a query (2649 / bright data / case-radar.ts)
Content search inside thread bodies + titles + project paths, ranked best-first. See Searching by content for what to type. A bare 3–6 digit query is treated as a PR reference.
--code-only (alone or with a query, e.g. --code-only 2649)
Restrict the result set to code-editing threads — the legacy behavior; read-only review/debug/investigate runs are dropped.
Anti-rationalization
Your reasoning
Why it's wrong
"I'll present the threads as a multiSelect AskUserQuestion so the user just clicks."
A single project holds far more than the 4-option AUQ cap (invariant #3). Selection is a numbered list + free-text reply; the only AUQ is the 3-option launch confirmation.
"The thread is obviously JSONL, so /analyze-thread will detect it — I'll drop --format=jsonl."
Current session logs begin with last-prompt / queue-operation lines, which /analyze-thread's sniff reads as markdown (invariant #2). Every launched and queued command must carry --format=jsonl.
"I'll search the bodies myself with grep -r <query>."
grep skips image-laden .jsonl logs as binary unless forced with -a, and the zsh sandbox strips PATH inside shell loops, so the search silently misses threads. Run scan.py (one Python process) — invariant #6, Phase 1.
"A bare number like 2649 should match those digits anywhere in the body."
That matches UUIDs, cache-token counts, and timestamps that happen to contain 2649 — dozens of false hits. scan.py reads a 3–6 digit query as a PR reference (pull/2649 / #2649 / pr-2649) and only falls back to the raw number when no PR reference exists.
"Rank #1 is obviously the thread — launch it."
Search ranks by proximity, not certainty (invariant #7). A worktree named pr-2649 mentions the number without being the review. Confirm the top candidates ran the skill the user means before launching.
"I'll only scan ~/.claude/projects."
Threads run under a second config dir ($CLAUDE_CONFIG_DIR, or one listed in scan.py's EXTRA_ROOTS) live elsewhere and would be invisible (invariant #6). scan.py scans every configured root.
"I'll label each project by decoding its folder name (- → /)."
That corrupts any project with a literal hyphen in its path (invariant #4). scan.py reads the true path from the JSONL cwd field.
"After more <project> I'll re-render that project's threads numbered from 1."
Renumbering on expand makes a pick collide with numbers already given to other rows. Numbers are assigned once across the full kept set; expansion only reveals hidden rows' existing numbers.
"I'll launch all selected threads in one /analyze-thread call to save round-trips."
/analyze-thread takes exactly one thread path per run. Launch the first and print the rest as a runnable queue.
"An oversize thread is fine to queue — let the user find out."
/analyze-thread refuses files over its 5 MB cap, so the queued command would just fail. Flag oversize threads up front so the user can split them first.
"The user wants threads worth analyzing — I'll skip the read-only review/debug runs."
The default surfaces read-only threads on purpose: a /geniro:review or /geniro:debug run that edited nothing is exactly what /analyze-thread inspects for pipeline failures. Drop them only when the user passes --code-only.
Definition of Done
Phase 1: scan.py ran across every config root; work-bearing threads kept (edited + read-only, or edited-only under --code-only); each row has a kind, title, true cwd label, date, turn count, oversize flag (and, for a query, a relevance score + snippet)
Phase 2 (list): rows grouped by project, newest-first, numbered once across the full set (stable on expand), capped at 10/project with "show more"; read-only rows tagged [read-only]
Phase 2 (search): flat ranked list, top 15 shown with snippets, total-matched count stated, top candidates sanity-checked against the query
Phase 3: free-text selection parsed and echoed; launch-confirmation AUQ fired (with a header)
Phase 3: first launchable pick launched as /analyze-thread <path> --format=jsonl; remaining launchable picks queued (each with --format=jsonl); oversize picks listed separately, not queued
No session log or any other file modified by this skill
REFERENCE
scan.py (sibling) — the discovery + search engine. Module docstring documents every column, root-resolution, the PR-number rule, the proximity score, the edited/read-only classification, and the --code-only flag. Add a new config dir to its EXTRA_ROOTS list.
${CLAUDE_PLUGIN_ROOT}/.claude/skills/analyze-thread/SKILL.md — the downstream consumer: input contract (single thread path in $ARGUMENTS), the --format=jsonl modifier, the 5 MB cap, and the sibling-launch pattern this skill mirrors
.claude/rules/skill-authoring.md · .claude/rules/skill-prose.md · .claude/rules/skill-structure.md — authoring conventions this skill follows by convention (project-local skills are outside CI lint scope)
