validate-issue

Validate every current-behavior claim against code. Input: an issue URL, #N, N, or owner/repo#N; with none, take the newest open issue and state its number. { issue: <N>, targetBranch?: "<branch>" } (or prose "target branch ") names the merge target, which replaces the default branch in step 0.

0. Baseline branch

No worktree for validation or issue edits. Resolve DEFAULT=$(gh repo view --json defaultBranchRef --jq .defaultBranchRef.name); with a targetBranch, validate it per work-on-issue step 1 ("Target"), set DEFAULT to it, and name it as the target in the verdict. Run git fetch origin "$DEFAULT"; the verdict states git rev-parse --short "origin/$DEFAULT" as the baseline. Read a working-tree path only when it is tracked and git diff --quiet "origin/$DEFAULT" -- <path> exits 0; otherwise read git show "origin/$DEFAULT":<path>.

1. Fetch the issue and linked PRs

Run gh issue view <N> --comments, then list the cross-referenced PRs that comments omit (owner/repo#N input names the repo):

gh api --paginate repos/{owner}/{repo}/issues/<N>/timeline --jq '.[] | select(.event=="cross-referenced") | .source.issue | select(.pull_request) | "\(.number) \(.state)"'

Verify a merged fix against current code and recommend closure or reuse; list open overlapping PRs under Concerns.

2. Extract claims and assertions

List each current-behavior claim (causes, citations, sets, negatives, benefit premises) and proposal assertion (goals, lifetime, population timing, benefits, consumers, failure policy, deployment surface, touched sites). Flag for 5a and 5b: a new subsystem, shared state, cross-cutting refactor, deduplication, single source of truth, multi-consumer coordination, or infrastructure analogy.

3. Verify claims

Trace each scenario through its conditions and config. Code outranks prose. Verify independently even for the repo owner, recent code, or runtime state machines. Apply every triggered depth rule:

1. Wrapper or helper: read its body and delegated or short-circuit paths.
2. Set claim: find real call sites, establish membership, diff the claimed set.
3. Benefit claim: prove the broken baseline exists in code, comments, or history.
4. Conjunction or negative: split atomic assertions; prove absence on all paths.
5. Negative over a window: trace the event-to-boundary dispatch and every producer.
6. Superlative, method-over-set, or cited baseline: establish population, tool coverage, source history.
7. Aggregate, dedupe, prorate, or shared state: verify the partition boundary and key against the scope.
8. Missing, undocumented, or unhandled surface: read surrounding content, find stale copy, diff deliverables.

Evidence outranks every verdict; reconcile it across bullets and paired findings.

4. Mark claims

✅ Verified, ❌ Refuted (name the real symbol), ⚠️ Conditional (name the config), or ❓ Unverified. Cite file:line; keep every unresolved claim.

5. Assess the proposal

Lead Proposal with a ≤55-word ASD-STE100 Goal stating the outcome. A refuted premise can make the proposal unnecessary.

5a. Architecture

For every proposal step 2 flagged, read architecture.md completely and apply it after claim tracing.

5b. Self-consistency

Whenever 5a runs, read proposal-consistency.md completely and apply it to the issue text.

5c. General checks

Run git log --since=7.days on touched paths. Check locking, migrations, reloads, idempotency, failure blast radius, parallel live/offline/admin paths, dual implementations, and recent-work regression. Material findings go under Concerns with file:line; a safety, recent-work, or parity defect requires an update.

6. Score complexity

Read complexity-scoring.md completely. Grade every axis against its anchors from the traced edit list and write its Axes: line with one piece of evidence per grade before you look up the grade the issue's rationale line states; then compare grade by grade and report all five grades. The canonical formula is:

1. Capability maps max(Risk, Uncertainty) as 0–1 → 0, 2 → 1, 3 → 2, 4 → 3. If Coupling ≥ 3, use at least Capability 2.
2. Volume is (Scope + Coupling + Verification) × 2.
3. Score is 25 × Capability + Volume.

Band	Score	Validate	fableplan	Build
0	0–9	Opus 5 · medium	No	Sonnet 5 · high
1	10–20	Opus 5 · high	No	Sonnet 5 · xhigh
2	21–49	Opus 5 · high	No	Opus 5 · high
3	50–70	Opus 5 · xhigh	No	Opus 5 · xhigh
4	71–80	Fable 5.1 · medium	Yes	Opus 5 · xhigh
5	81–99	Fable 5.1 · high	Yes	Opus 5 · xhigh

fableplan is yes when the score is 71 or higher. The Build column is the Claude default; an Execution block stamped <Name> (Codex CLI) or <Name> (Cursor CLI) overrides it through the cli-dispatch shim. The Validate column is the band default; an ## Execution block may stamp Validate effort: to override it and Plan effort: to override the fableplan stage's high default. The validate model is never stampable, and an Opus validate stamped low or medium runs at high (Fable-only tiers). The first review uses the coarser table below; each row starts on a band edge.

Score	First review	Claude	Codex
0–20	Sonnet 5 · high	@claude sonnet review	@codex luna review
21–70	reviewer default	@claude review	@codex review
71–80	Opus 5 · high	@claude opus review effort:high	@codex review
81–99, or no score	Fable 5.1 · high	@claude fable review effort:high	@codex review

Blocking re-reviews step down one rung per cycle, keyed to the reviewer that actually ran cycle 1 (skills/fix-pr-review/rereview-routing.md).

7. Scope disposition

A high score alone is acceptable. Split and Umbrella need all three gates:

1. Each part ships, passes tests, and delivers value in its own PR.
2. Fold each part below C41 into the parent; at least two parts of C41 or higher remain. A folded part forces Umbrella. With fewer than two, keep one issue, emit OK — restructure as in-body checklist, and require an update when the body lacks that checklist.
3. The combined diff is roughly above 500 changed lines, parts route to different bands, or a part carries money, data-integrity, or security risk.

Keep one issue when a gate fails or one root cause needs one diff. Split = independent parts, none folded. Umbrella = coordinated or folded parts. Narrow is always available: keep the core, move extras to a Future note. Each child needs its own scored title, problem, and acceptance criteria. Scope and update decisions are independent.

8. Output the verdict

Omit empty optional sections:

Claims:
- <status> <claim> — <evidence>
Architecture:  # only when 5a ran
- <status> <placement/owner/medium> (<dispatch file:line>)
- Optimal: <required for ⚠️/❌>
Concerns:  # only when present
- <concern> (<file:line>)
Proposal:
- Goal: <plain simple English, ≤55 words>
- <status> <consistency gap>  # only when 5b is not ✅
Scope:  # only for a disposition
- <disposition> — <reason and parts>
Axes:
- Scope <s> — <evidence>
- Coupling <c> — <evidence>
- Risk <r> — <evidence>
- Uncertainty <u> — <evidence>
- Verification <x> — <evidence>
- Differs: <axis> <issue grade> → <traced grade>  # only when the issue states a different grade
**#<N>: Update issue description? <Yes | No>** · Complexity: <score>/100 — Capability <k> (Risk <r>, Uncertainty <u> — <driver>); Volume <v> (Scope <s>, Coupling <c>, Verification <x>) · fableplan: <yes|no> · Scope: <OK | too large — split/umbrella/narrow>
<specific edits when Yes>
<next-step line>

Yes for a material ❌/⚠️ claim, architecture or consistency gap, material concern, missing scope, required restructure, or a rescore: a title prefix below the recomputed score, or a rationale line whose grades differ from the traced ones at a recomputed score that is not lower. The rescore edits restamp the title prefix, the rationale line, and the fableplan signal to the recomputed values per issue-editing.md, and when the body carries an ## Execution block they also restamp its Build model:, Effort:, and fableplan first: lines to the recomputed band's defaults, upward only: a stamp on Fable 5.1 or on a Codex CLI or Cursor CLI harness keeps its model and effort and gains only fableplan first: Yes. A recomputed score below the title score restamps nothing, and the verdict carries the Differs: lines only; a title with no prefix gets none from a rescore. The verdict's Complexity: value is always the recomputed score. The verdict's fableplan: field is a routing signal: yes when the title score or the recomputed score is 71 or higher; a rescore never lowers routing. No only when accurate, feasible, consistent, and complete, with no rescore edit due.

Next-step line. Post the first matching string verbatim. With fableplan no, drop that option and its connective; in case 3 the or moves before "update issue":

1. Split/umbrella scope: → Recommend "split issue" to restructure; or "update issue" to edit, "work on issue" to build as-is, "fableplan" to plan first.
2. Update is Yes: → Recommend "update issue" to apply the edits above; or "work on issue" to build as-is, "fableplan" to plan first.
3. Otherwise: → Reply "work on issue" to proceed, "update issue" to edit, or "fableplan" to plan first.

9. Handle "work on issue"

Invoke work-on-issue with the issue number; surface any step-7 disposition first.

10. Handle "fableplan"

Invoke fableplan with the issue number; honor an explicit request even at signal no.

11. Handle "update issue"

Read issue-editing.md completely and apply it from the checkout, with no worktree.