Lisa Github Validate Issue

Validate GitHub Issue: $ARGUMENTS

Run all organizational quality gates against an issue spec OR an existing issue. This skill is read-only — it never writes to GitHub. The output is a structured report consumed by callers (lisa-github-write-issue for pre-write gating, lisa-github-to-tracker for PRD dry-run, lisa-github-verify for post-write checks).

Input

$ARGUMENTS is one of:

1. An existing issue ref (org/repo#<number> or https://github.com/<org>/<repo>/issues/<number>): fetch it and validate the live state. Use this for post-write checks.
2. A proposed issue spec (YAML block, see schema below): validate as-is without touching GitHub. Use this for pre-write and dry-run checks.

Spec schema

Specs are passed as a fenced YAML block. Required keys depend on issue_type.

issue_type: Story          # Story | Task | Bug | Epic | Spike | Sub-task | Improvement
org: my-org
repo: my-repo
summary: "[CU-1.2] Upload contract PDF from settings"
priority: medium
parent_ref: "my-org/my-repo#1234"   # Parent Epic for non-Bug/non-Epic; Story for Sub-task
body: |
  ## Context / Business Value
  ...

  ## Technical Approach
  ...

  ## Acceptance Criteria
  ```gherkin
  Scenario: <name>
    Given <precondition>
    When <action>
    Then <observable outcome>

Out of Scope

...

Target Backend Environment

dev

Sign-in Required

Account: ...

Repository

backend-api

Validation Journey

...

Behavioral flags — caller asserts these so the validator can pick the right gates

runtime_behavior_change: true # → requires Target Backend Environment + Validation Journey authenticated_surface: true # → requires Sign-in Required artifacts_attached: true # → requires Source Precedence section links: [{ ref: "my-org/my-repo#99", type: "is blocked by" }] # known issue links (may be empty) remote_links: [{ url: "https://github.com/.../pull/42", title: "PR #42" }] journey_followup: auto # auto | none — see S11 build_ready: true # caller asserts the build-ready role (status:ready) is/would be applied — see S15 child_refs: ["my-org/my-repo#601", "my-org/my-repo#602"] # known child work (sub-issues / task-list / "Blocked by" parentage) — see S15

If the caller passes only an issue ref, fetch via `gh issue view <number> --repo <org>/<repo> --json number,title,body,labels,state,milestone,assignees`, parse the body sections, derive the spec fields, then run gates. The parser lives in `lisa-github-read-issue` (composition).

## Gates

Gates are grouped into **Specification** (spec-only checks, no GitHub lookups) and **Feasibility** (requires GitHub lookups). The dry-run path may opt to run Specification gates only via `--spec-only`; the write path runs both.

Each gate is tagged with a fixed `category` and a `product_relevant` boolean. Categories are the same fixed set used by `lisa-jira-validate-ticket` so downstream PRD-intake comment-formatting policy is shared across vendors.

| Gate | Category | Product-relevant |
|------|----------|------------------|
| S1 Required core fields | `structural` | false |
| S2 Summary format | `structural` | false |
| S3 Description three audiences | `product-clarity` | true |
| S4 Acceptance criteria in Gherkin | `acceptance-criteria` | true |
| S5 Bug-specific content | `product-clarity` | true |
| S6 Spike-specific content | `scope` | true |
| S7 Parent sub-issue declared | `structural` | false |
| S8 Target Backend Environment | `technical` | false |
| S9 Sign-in Required | `technical` | false |
| S10 Single-repo scope | `scope` | false |
| S11 Validation Journey | `acceptance-criteria` | true |
| S12 Source Precedence | `design-ux` | true |
| S13 Relationship Search | `dependency` | true |
| S14 Evidence manifest binding (leaf work units) | `acceptance-criteria` | true |
| S15 Leaf-only build-ready | `structural` | false |
| F1 Issue type label exists in repo | `structural` | false |
| F2 Parent sub-issue exists and is the right type | `structural` | false |
| F3 Linked issues exist | `structural` | false |
| F4 Required labels populated | `structural` | false |

Category values are the same fixed set as `lisa-jira-validate-ticket`:

- `product-clarity`, `acceptance-criteria`, `design-ux`, `scope`, `dependency`, `data`, `technical`, `structural`.

### Specification Gates

#### S1 — Required core fields

`org`, `repo`, `issue_type`, `summary`, `priority`, `body` must all be present and non-empty.

#### S2 — Summary format

- Single line, ≤ 100 characters.
- Imperative voice ("Add X", "Fix Y", not "Adding X" or "X is broken").
- Bug / Task / Sub-task summaries SHOULD start with a `[repo-name]` prefix when the project convention uses one.

#### S3 — Description has all three audiences

Body must include all of these sections (case-insensitive `## ` headings):

- `Context / Business Value` — stakeholder-facing
- `Technical Approach` — developer-facing
- `Acceptance Criteria` — coding-assistant-facing
- `Out of Scope` — explicit non-coverage list

Missing any → FAIL with name of missing section.

#### S4 — Acceptance criteria in Gherkin

Applies when `issue_type ∈ {Story, Task, Bug, Sub-task, Improvement}`.

The `## Acceptance Criteria` section must contain at least one `Scenario:` block with `Given / When / Then` form, ideally inside a ` ```gherkin ` code fence. Reject prose-only criteria, "should work" language, or numbered lists without Given/When/Then verbs.

#### S5 — Bug-specific content

When `issue_type = Bug`, body must additionally include:

- Reproduction steps
- Expected vs. actual behavior
- Environment where reproduced

#### S6 — Spike-specific content

When `issue_type = Spike`, body must include:

- The question being answered
- Definition of done (decision doc / prototype / findings deliverable)

#### S7 — Parent sub-issue declared

When `issue_type ∉ {Bug, Epic}`, `parent_ref` must be set — **except for a build-ready leaf work unit**, which may stand alone. A flat `Task` / `Improvement`, or a childless `Story` / `Spike` (no open child work) with `build_ready = true`, is an independently claimable leaf per `leaf-only-lifecycle`, which states such leaves "must not be stranded"; for these a missing parent is `N/A`, not a FAIL. This mirrors the leaf carve-out already in S10/S15. A `Sub-task` is exempt from this exception — it always requires a parent. When a parent IS declared, the native sub-issue link is set by `lisa-github-write-issue` Phase 6 step 3. (Validity of a declared parent is checked in feasibility gate F2.)

#### S8 — Target Backend Environment

When `runtime_behavior_change = true`, body must contain `## Target Backend Environment` with one of `dev`, `staging`, `prod`. Skipped for doc-only / config-only / type-only / Epic.

#### S9 — Sign-in Required

When `authenticated_surface = true`, body must contain `## Sign-in Required` naming the account/role and credential source.

If the spec doesn't set `authenticated_surface`, infer it: scan the body and AC for sign-in / login / "as a {role} user" / authenticated route signals. If signals present and no `Sign-in Required` section: FAIL.

#### S10 — Repository section, single-repo scope

When `issue_type ∈ {Bug, Task, Sub-task, Improvement}` — or a **build-ready childless Story/Spike** (a claimable leaf per `leaf-only-lifecycle`) — body must contain `## Repository` naming exactly one repo. Multiple repos OR cross-repo references in AC: FAIL with recommendation `"Split into per-repo work units under a shared parent Story (see lisa-task-decomposition step 1.5)"`.

(GitHub Issues live in one repo by definition, so the `## Repository` section is technically redundant — keep it for parity with the JIRA path so downstream tooling sees the same shape. Cross-repo references in AC are still possible and still fail this gate.)

An **Epic**, or a **Story/Spike that still holds child work** (or is not build-ready): skipped (may span repos — coordination containers, not claimable leaf work units).

This gate is `product_relevant: false` because cross-repo work units are not a product question — they are a decomposition error. Callers (`lisa-github-to-tracker`, `lisa-notion-to-tracker`, etc.) MUST pre-split cross-repo work into per-repo work units during the decomposition phase per `lisa-task-decomposition` step 1.5; an S10 failure here indicates the agent skipped that step and must auto-split + revalidate before writing, not surface a clarifying comment to product.

#### S11 — Validation Journey present

When `runtime_behavior_change = true`, body must contain `## Validation Journey`. Skipped for doc-only / config-only / type-only / Epic.

The caller controls strictness via `journey_followup`:
- `auto` (default): missing section is FAIL with remediation `"Invoke lisa-github-add-journey to append the section after create"`. Callers like `lisa-github-write-issue` know to chain the followup automatically.
- `none`: missing section is FAIL the caller will not auto-fix (used by dry-run paths).

#### S12 — Source Precedence (when artifacts attached)

When `artifacts_attached = true`, body must include source-precedence guidance covering: business rules → PRD body, visual treatment → mocks, flow → prototypes, API/data → data artifacts. Cross-axis conflicts surfaced under `## Open Questions`.

Accept either placement:
- A dedicated `## Source Precedence` subsection, OR
- A "Source Precedence" / "authoritative source" paragraph under `## Technical Approach`.

Detect by scanning for the phrase `Source Precedence` (case-insensitive) AND verifying the four axes (business rules, visual, flow, data) are each named.

#### S13 — Relationship Search documented

The issue must EITHER have at least one entry in `links`, OR the body must contain a `## Relationship Search` block listing the git history queries and `gh issue list` queries that were run with their outcomes. ("Searched git history for `<keywords>` and `gh issue list` for label `component:X`; no related work found.")

An issue with zero links and no documented search: FAIL.

#### S14 — Evidence manifest binding (leaf work units)

When `issue_type ∈ {Bug, Task, Sub-task, Improvement}` AND `runtime_behavior_change = true`, the `## Validation Journey` must declare at least one `[EVIDENCE: name]` marker. Each marker name must be kebab-case and unique within the issue. These markers are the work unit's **evidence manifest** — the exact, enumerated set of artifacts that must be captured and attached before the issue may be closed (see the "Per-Work-Unit Evidence Contract" section of the `verification` rule, the Definition of Done in `verification-lifecycle`, and the evidence-manifest gate in `tracker-evidence`).

FAIL when the Validation Journey is present but declares zero `[EVIDENCE: name]` markers, or when any marker name is empty, duplicated, or not kebab-case. A behavior-changing work unit SHOULD declare both a success marker and an error/edge marker; a journey with only one marker passes but the remediation should recommend adding the error/edge case.

This gate depends on S11. It is `N/A` for containers — an **Epic**, or any item with open child work (coordination containers, not work units) — and for leaf units with `runtime_behavior_change = false` (doc-only / config-only / type-only). If S11 fails because the Validation Journey is absent, S14 also FAILs (there is no manifest to bind) with remediation pointing back to `lisa-github-add-journey`.

#### S15 — Leaf-only build-ready

Enforces the build-side of the vendor-neutral `leaf-only-lifecycle` rule: **only a leaf work unit may carry the build-ready role.** This is the symmetric write-side guard for the GitHub validator — a stale or hand-applied `status:ready` on a container is a lifecycle error and must FAIL here, regardless of how the issue was produced. (Mirrors the "Build-ready label is leaf-only" rule that `lisa-github-write-issue` applies at write time.)

**When the gate applies.** Run S15 whenever the issue is build-ready — i.e. `build_ready = true`, or the spec/live labels include `status:ready`. If the issue is not build-ready, S15 is `N/A` (nothing claims a non-ready issue, so the invariant is vacuous).

**Resolve container vs. leaf — structural first, then nominal.** Per `leaf-only-lifecycle` the classification is structural: an item is a **container** if it has child work, whatever its declared type; otherwise the **type label** decides. Determine child work from (in order) `child_refs`, native sub-issues, body task-list checkboxes, and `Blocked by #<n>` / parent references — the same hierarchy resolution `lisa-github-read-issue` uses. When validating a live ref, query sub-issues alongside the issue fetch.

Apply this decision and FAIL the two invariant-violating cases:

1. **Container with child work + build-ready** — child work is present (any type that has open children), AND build-ready. FAIL. A parent organizes work; it is never claimed and implemented directly. Its lifecycle state rolls up from its children.
2. **Childless Epic + build-ready** — `issue_type = Epic` with **no** child work, AND build-ready. Still FAIL: an Epic is a pure rollup container by design, and a childless one is an incomplete decomposition or a mis-applied role, not an implementable unit. (A childless Story or Spike is **not** failed here — the childless-parent exception in `leaf-only-lifecycle` promotes every childless non-Epic type to a build-ready leaf.)

PASS (the childless-parent exception) when the issue is build-ready and is a **leaf work unit**: it has **no** open child work and `issue_type ≠ Epic` (i.e. `Bug, Task, Sub-task, Improvement`, or a childless `Story` / `Spike`). A flat Task/Bug, or a childless Story/Spike with no sub-issues, is a valid build-ready leaf and must not be stranded.

| issue_type | has child work | build-ready | S15 |
|---|---|---|---|
| Bug / Task / Sub-task / Improvement / Story / Spike | no | yes | **PASS** (leaf) |
| any type | yes | yes | **FAIL** (structurally a container) |
| Epic | no | yes | **FAIL** (childless Epic — pure rollup container, exception does not apply) |
| any | any | no | **N/A** (not build-ready) |

Remediation: `"Build-ready (status:ready) is leaf-only per leaf-only-lifecycle. Move status:ready off this container onto its leaf children (or, for a childless Epic, decompose it into leaf children or reclassify it to a leaf type); a parent's lifecycle state rolls up from its children and is never set to ready directly."`

`product_relevant: false` — a build-ready container is a lifecycle/decomposition error for the caller to repair, not a product question.

### Feasibility Gates (require GitHub lookups; skip in `--spec-only`)

#### F1 — Issue type label exists in repo

```bash
gh label list --repo <org>/<repo> --json name --jq '.[].name'

Confirm type:<issue_type> exists. Missing labels can be auto-created by lisa-github-write-issue Phase 5 — flag the absence as a structural FAIL with remediation "Run gh label create type:<issue_type> or let the write path auto-create."

F2 — Parent sub-issue exists and is the right type

When parent_ref is set:

gh issue view <number> --repo <org>/<repo> --json number,labels,state

Confirm the parent issue exists and:

• For non-Sub-task children: parent has type:Epic label.
• For Sub-task children: parent has type:Story, type:Task, type:Bug, or type:Improvement (anything that can host sub-tasks).

F3 — Linked issues exist

For each entry in links, run gh issue view <number> --repo <link-org>/<link-repo> to confirm the ref resolves. Flag broken refs.

F4 — Required labels populated

Per Phase 5 of lisa-github-write-issue, every issue MUST carry: type:<issue_type>, status:<status>, priority:<priority>. If any are missing from the spec / live issue, FAIL with the missing label name.

Execution

1. Parse $ARGUMENTS. If it's an issue ref, fetch via gh issue view --json and derive the spec fields — including build_ready (label set contains status:ready) and child_refs (native sub-issues plus body task-list / Blocked by #<n> parentage, resolved as in lisa-github-read-issue) so S15 can classify the issue. Otherwise parse the YAML spec.
2. Confirm gh auth status succeeds before any feasibility gate runs.
3. Run every Specification gate in order. Collect PASS / FAIL / N/A with a one-line reason.
4. Unless the caller passed --spec-only, run every Feasibility gate.
5. Emit the report below.

Output

Output is a single fenced text block. Callers parse it; do not add free-form prose around it.

## github-validate-issue: <ISSUE-REF-or-SUMMARY>

### Specification Gates
- [PASS|FAIL|N/A] S1 Required core fields — <one-line reason>
- [PASS|FAIL|N/A] S2 Summary format — <one-line reason>
- [PASS|FAIL|N/A] S3 Description three audiences — <one-line reason>
- [PASS|FAIL|N/A] S4 Acceptance criteria in Gherkin — <one-line reason>
- [PASS|FAIL|N/A] S5 Bug-specific content — <one-line reason>
- [PASS|FAIL|N/A] S6 Spike-specific content — <one-line reason>
- [PASS|FAIL|N/A] S7 Parent sub-issue declared — <one-line reason>
- [PASS|FAIL|N/A] S8 Target Backend Environment — <one-line reason>
- [PASS|FAIL|N/A] S9 Sign-in Required — <one-line reason>
- [PASS|FAIL|N/A] S10 Single-repo scope — <one-line reason>
- [PASS|FAIL|N/A] S11 Validation Journey — <one-line reason>
- [PASS|FAIL|N/A] S12 Source Precedence — <one-line reason>
- [PASS|FAIL|N/A] S13 Relationship Search — <one-line reason>
- [PASS|FAIL|N/A] S14 Evidence manifest binding — <one-line reason>
- [PASS|FAIL|N/A] S15 Leaf-only build-ready — <one-line reason>

### Feasibility Gates  (omit this section when --spec-only)
- [PASS|FAIL|N/A] F1 Issue type label exists in repo — <one-line reason>
- [PASS|FAIL|N/A] F2 Parent sub-issue exists and is the right type — <one-line reason>
- [PASS|FAIL|N/A] F3 Linked issues exist — <one-line reason>
- [PASS|FAIL|N/A] F4 Required labels populated — <one-line reason>

### Verdict: PASS | FAIL
### Failures: <count>
### Failure details
- gate: <gate-id>
  category: <product-clarity|acceptance-criteria|design-ux|scope|dependency|data|technical|structural>
  product_relevant: <true|false>
  what: <plain-language description, no gate IDs, no GitHub jargon — written for a non-engineer product owner>
  recommendation: <1–3 concrete options the caller (or downstream product team) can pick from. Never "clarify this".>
- gate: <gate-id>
  ...

The verdict is PASS if every applicable gate is PASS. Any FAIL makes the verdict FAIL. N/A does not affect the verdict.

Failure-detail fields

Same shape and meaning as lisa-jira-validate-ticket so downstream PRD-intake skills (Notion, Confluence, Linear, GitHub) can format comments uniformly:

• gate: the gate ID (S1–S15, F1–F4).
• category: the gate's fixed category from the table.
• product_relevant: matches the gate's table entry. false means the failure is an internal data-quality problem the caller should fix without bothering product.
• what: plain-language, product-readable.
• recommendation: 1–3 concrete options.

Rules

• Never write to GitHub. The allowed-tools list intentionally excludes any gh issue create / edit / comment / close invocation.
• Never auto-fix the spec. This skill reports gaps; callers decide what to do.
• Never silently skip a gate. Return N/A with the reason if a gate genuinely doesn't apply; never omit it.
• The what and recommendation must be concrete and product-readable — vague guidance ("clarify this") is useless.
• Never emit a category outside the fixed set.
• product_relevant is determined by the gate, not by the failure context.
• When validating an existing issue ref, parse the body via the same logic as lisa-github-read-issue so the two skills agree on what they see.