Session Triage

Session Triage

Use this skill when the user wants a focused investigation of one immediate issue: a current conversation problem, one correction, one session, one repo incident, one failed run, or one suspected skill failure. This skill verifies what happened before recommending a durable fix.

Use /analyze-sessions instead for informational history questions — single or trend — such as broad cross-session breakdowns, recurring frustration analysis, performance over time, repeated prompt patterns, automation opportunities, finding a past conversation, or checking one run's token spend. This skill owns live incidents that need a verified fix.

Inputs

• Active conversation context.
• Optional session ID, session file, or exported log.
• Optional repository path or current working directory.
• Optional skill name or SKILL.md path.
• Optional user correction text, error output, test failure, log excerpt, file path, commit, or issue description.
• Optional benchmark regression mode: invoked as /session-triage <skill> benchmark regression by /benchmark-test-skill when scripts/benchmark-regression-check.mjs reports a regression verdict. The prior-vs-new delta block (passRate, Wilson lower bound, output-quality, status badge, prior and new grade dates) is carried in as evidence; the appended grade rows live in benchmark/grade-history.json.

Process

1. Define the investigation scope:

   • Treat the current conversation and current working directory as the default scope.
   • Prefer user-provided session IDs, files, repo paths, skill names, exact correction phrases, errors, logs, and test failures over broad history searches.
   • Resolve named skills from base/codex, base/claude, packs, project-local .agents, .codex, .claude, and installed ~/.codex/skills or ~/.claude/skills as read-only fallback evidence.
   • Do not create an /analyze-session alias or route; use this distinct command name to avoid singular/plural confusion.

2. Gather narrow evidence first:

   • Read the target skill contract when a skill is named.
   • Read directly relevant project instructions such as AGENTS.md, CLAUDE.md, task docs, pack docs, logs, or test output.
   • Search only the scoped repo/session/history for the issue text, skill name, invocation command, relevant file paths, user correction, and nearby agent actions.
   • Include the active conversation as evidence when the correction is happening now.
   • Broaden to /analyze-sessions only when recurrence, frequency, or trend evidence is needed.

3. Verify the issue before diagnosing:

   • Separate the user-identified issue from the agent-verified issue.
   • Classify the verification verdict as verified, partially verified, not verified, or inconclusive.
   • A verified issue requires evidence for what the agent did, what the skill/repo/user contract required, and why the outcome was wrong or risky.
   • If evidence shows the skill contract was adequate and the agent ignored it, say that directly.

4. Build a concise timeline:

   • User request or trigger.
   • Skill or instruction that should have applied.
   • Agent action or omission.
   • Failure, correction, or observed impact.
   • Relevant repo/session state.

5. Diagnose root cause:

   • Identify whether the cause is a missing trigger, ambiguous trigger, missing evidence gate, insufficient scope resolution, weak output contract, bad next-step routing, missing validation, missing safety constraint, stale mirrored contract, repo instruction conflict, or agent noncompliance with an adequate contract.
   • Compare Claude and Codex skill versions when both exist and flag mirrored drift.
   • Check tasks/lessons.md when working in agentic-skills; reuse existing lessons or recommend a new lesson when the pattern is novel.
   • For benchmark failures, check recent same-skill benchmark/triage-<skill>-*.md reports and tasks/lessons.md before recommending a narrow tolerance patch. If two or more recent reports classify the same family of valid outputs as benchmark false negatives, stop patching individual phrasings and route to a generalized rubric, semantic evaluator, fixture-family, or infrastructure-classifier fix that covers the family.
   • For a benchmark regression invocation, the absolute thresholds may still pass — the issue is a drop relative to the prior grade. Use the carried delta and benchmark/grade-history.json to confirm the regression is real (not a one-run sampling artifact: small evaluated-run counts and wide Wilson intervals can move >=10pp by chance — say so and recommend a confirming re-run when the sample is thin). Then classify the cause:
     • Real behavioral regression — the skill contract or a dependency changed and the agent now produces worse output. Route the fix to /targeted-skill-builder <skill> benchmark regression naming the contract section that drifted, and confirm the loop closes by re-running /benchmark-test-skill <skill> to verify the grade recovers in grade-history.json.
     • Harness / rubric drift — the skill behavior is unchanged but a setup, fixture, evaluator, or pricing/threshold change moved the score. Reuse the false-negative-family logic above (steps 5-6): name the owning harness/setup file and the family-level behavior to recognize, rather than patching one phrasing.

6. Recommend the smallest durable fix:

   • Name exact skill file(s), instruction file(s), or docs to change.
   • Provide concrete rule text or workflow-step wording when a skill-contract change is justified.
   • Include validation checks that prove the revised behavior prevents the issue, such as targeted rg checks, mirrored contract checks, version checks, replay of the decision path, or the failing test/log command.
   • For repeated benchmark false-negative families, the recommended fix must name the owning harness or setup file, the family-level behavior to recognize or reject, positive and negative fixture shapes to add, and a validation command such as focused layer1 setup tests plus pnpm --dir tests verify --skill <skill>.
   • Route verified skill changes to /targeted-skill-builder (skill-dev pack) for a narrow update or /create-agentic-skill (skill-dev pack) for a new repo-managed skill.

7. Optionally enrich the persistent insights memory (secondary writer):

   • When the triaged incident is a verified, generalizable pattern (not a pure one-off), append it to the machine-local .session-insights/insights.md store that /analyze-sessions accumulates, so live incidents and cross-session trends share one memory.
   • The store is gitignored and may not exist yet; create it with the standard keyed table header (| Insight | Category | First Seen | Last Seen | Occurrences | Status |) if absent. If a semantically matching row already exists, increment its Occurrences and advance Last Seen instead of adding a duplicate; otherwise add a row with Occurrences 1 and Status confirmed (triage incidents are verified).
   • This is additive memory only — tasks/lessons.md remains the authoritative correction log; do not move lessons content into the insights store.

Output

Produce a structured report with:

• Target: session/repo/skill scope and evidence sources.
• User-identified issue: the user's claim in concise terms.
• Verification verdict: verified, partially verified, not verified, or inconclusive, with supporting evidence.
• Timeline: short sequence from trigger to correction or impact.
• Root cause: the specific contract gap, repo conflict, or agent noncompliance pattern.
• Responsible contract gap: skill, project instruction, task doc, or none.
• Recommended fix: exact file(s), section(s), and proposed wording or behavior change.
• Validation plan: commands or checks to prove the fix.
• Confidence and evidence gaps: what is known, what could not be verified, and whether /analyze-sessions is needed for recurrence analysis.
• Recommended next skill: /targeted-skill-builder (skill-dev pack), /create-agentic-skill (skill-dev pack), /analyze-sessions, or none when no follow-up is justified. For a confirmed real benchmark regression, recommend /targeted-skill-builder <skill> benchmark regression and name re-running /benchmark-test-skill <skill> as the loop-closing verification (see docs/benchmark-improvement-loop.md).

Constraints

• Start narrow and evidence-bound; do not scan all local history by default.
• Do not claim a user-identified issue is agent-verified without independent evidence.
• Do not modify the target skill during analysis unless the user also asked for implementation and the active workflow permits edits.
• Do not recommend a skill change when the evidence points only to one-off agent noncompliance and the contract is already clear.
• Do not create or suggest /analyze-session; use /session-triage.
• Do not create or modify GitHub Actions workflows.
• If a source is missing or unreadable, report that clearly and continue with available evidence instead of guessing.
• When recommending a skill from another pack, verify the pack is installed via .agents/project.json enabled_packs. If not installed, prepend npx skillpacks install <pack-name> to the recommendation.

Default Shipping Contract

Follow the shared shipping contract convention in CLAUDE.md.