Issue Analyze Skill

Trigger

• Keywords: analyze issue, investigate problem, problem analysis, root cause, root cause analysis, triage review, review thread analysis

Input Types

When input is a Review Thread:

• Phase 1 skips gh issue view, uses provided thread data directly
• Phase 2 classification uses Review Thread dimensions (see references/classification.md)

Modes

When NOT to Use

• Known root cause, fix directly (use /bug-fix)
• Pure feature development (use /feature-dev)
• Only need code review (use /codex-review)

Workflow

┌─────────────────────────────────────────────────────────────────┐
│ Phase 1: Read Issue / Review Thread                             │
├─────────────────────────────────────────────────────────────────┤
│ GitHub Issue: gh issue view <number> --json ...                  │
│ Review Thread: use provided { path, line, reviewer, comment }   │
│ Extract: symptoms, reproduction steps, error messages, files    │
└─────────────────────────────────────────────────────────────────┘
                              ↓
┌─────────────────────────────────────────────────────────────────┐
│ Phase 2: Problem Classification                                 │
├─────────────────────────────────────────────────────────────────┤
│ GitHub Issue: Determine problem type → investigation strategy   │
│ Review Thread: Determine category → actionability               │
│                                                                 │
│ ┌────────────────┬──────────────────────────────────┐           │
│ │ Type           │ Investigation Strategy            │           │
│ ├────────────────┼──────────────────────────────────┤           │
│ │ Unfamiliar     │ /code-explore                    │           │
│ │ Regression     │ /git-investigate                 │           │
│ │ Complex root   │ /code-investigate (dual view)    │           │
│ │ Multiple cause │ /codex-brainstorm (exhaustive)   │           │
│ │ Composite      │ Combine multiple strategies      │           │
│ └────────────────┴──────────────────────────────────┘           │
└─────────────────────────────────────────────────────────────────┘
                              ↓
┌─────────────────────────────────────────────────────────────────┐
│ Phase 2.5: Verdict Assessment (NEW)                             │
├─────────────────────────────────────────────────────────────────┤
│ Codex blind verification: ACTIONABLE / NON_ACTIONABLE / UNCERTAIN│
│ Fresh mcp__codex__codex thread, read-only, anti-anchoring       │
│ Pattern: @skills/seek-verdict/references/verdict-prompt.md      │
│ Thresholds: @skills/seek-verdict/references/policy-mapping.md   │
│                                                                 │
│ ⚠️ Never send Claude's classification to Codex                  │
│ --triage mode: stop here, output verdict + classification       │
└─────────────────────────────────────────────────────────────────┘
                              ↓
┌─────────────────────────────────────────────────────────────────┐
│ Phase 3: Execute Investigation                                  │
├─────────────────────────────────────────────────────────────────┤
│ Skip if verdict = DISMISS_VERIFIED (per policy-mapping thresholds)    │
│ Otherwise: invoke corresponding investigation command           │
└─────────────────────────────────────────────────────────────────┘
                              ↓
┌─────────────────────────────────────────────────────────────────┐
│ Phase 4: Consolidated Report                                    │
├─────────────────────────────────────────────────────────────────┤
│ Synthesize investigation results + verdict, produce report      │
└─────────────────────────────────────────────────────────────────┘

Problem Classification Decision Tree

Issue Symptoms
    │
    ├─ "It used to work, now it doesn't" ───→ /git-investigate
    │                                          (find introduction point)
    │
    ├─ "Don't know how this feature works" ─→ /code-explore
    │                                          (quick understanding)
    │
    ├─ "Has error message / stack trace"
    │       │
    │       ├─ Clear error ────────────────→ /code-explore
    │       │                                (trace path)
    │       │
    │       └─ Vague / intermittent ───────→ /code-investigate
    │                                        (dual-view confirmation)
    │
    ├─ "Many possible causes" ────────────→ /codex-brainstorm
    │                                        (exhaustive analysis)
    │
    └─ Composite / uncertain ─────────────→ Start with /code-explore
                                             then choose based on results

Investigation Tool Comparison

Phase 2.5: Verdict Assessment

After classification, run Codex blind verification to independently assess actionability.

Codex call requirements (same as /seek-verdict pattern):

Prompt construction: follow @skills/seek-verdict/references/verdict-prompt.md pattern, adapting input:

• GitHub Issue input: provide issue title, body, labels as finding context
• Review Thread input: provide file path, line, reviewer comment as finding context
• Always include Standard Research Block (git status, git diff, grep, cat)

Codex output (all fields required):

- codex_verdict: ACTIONABLE | NON_ACTIONABLE | UNCERTAIN
- confidence: [0.0 - 1.0]
- evidence_refs: [files/lines/commands used]
- reasoning: [why this verdict]

Policy mapping: follow @skills/seek-verdict/references/policy-mapping.md thresholds (normal state; heightened thresholds apply after [DISMISS_PATTERN_WARN] — see policy-mapping.md Anti-Abuse Guard):

--triage mode: stop after Phase 2.5, output classification + verdict only.

Graceful degradation: if Codex call fails, log warning and proceed to Phase 3 without verdict.

Output

Full Report (default)

## Issue Analysis: <title>
- **Classification**: <problem type>
- **Verdict**: ACTIONABLE / NON_ACTIONABLE / UNCERTAIN (confidence: 0.XX)
- **Root cause hypothesis**: <analysis>
- **Investigation strategy**: <tools + plan>
- **Priority**: P0 / P1 / P2

Triage Report (--triage mode)

## Triage: