Documentation Audience Tracks Apply

Operationalises spec/project/docs-audience-tracks/<canonical_language>.md inside the current repository. The skill audits whether every page under docs/<lang>/ carries the track: frontmatter, whether each track ships the content blocks the spec mandates, and whether the project's audience artefact maps each audience to a track. With explicit per-item user consent it migrates an existing (brownfield) documentation tree onto the contract or patches a single finding at a time.

When the spec isn't present in the target repository, fall back to the copy shipped by the nolte-shared plugin (read it at runtime from ${CLAUDE_PLUGIN_ROOT}/spec/project/docs-audience-tracks/<canonical_language>.md). Never invent requirements that don't appear in the spec.

Why this is a skill, not an agent

Per spec/claude/skill-vs-agent/ §Decision dimensions, this capability is a skill because:

• Mid-flow user approval is the contract. Every page-frontmatter edit, every content-block scaffold, and every audience-artefact patch is written only with explicit per-change confirmation; the audit is read-only and the apply step is a sequence of approvals an agent's fire-and-forget shape can't carry.
• Persistent on-disk output that flows back into the main conversation. The audit table, the per-page proposals, the audience-artefact diff, and the post-migration mkdocs build --strict output all surface in the conversation so the user can decide; isolating them in a structured-report boundary would obscure the per-file approval surface.
• Orchestrator pattern. The skill can dispatch the audience-doc-author agent for content-block authoring once the container exists, the audience-identify skill for missing audience artefacts, and docs-freshness-checker for the post-migration parity check; per spec/claude/skill-vs-agent/ §Hybrid pattern, the orchestrator is always a skill.
• Precedent. Follows the same audit + scaffold + patch shape as mkdocs-structure-apply, project-structure-apply, skill-agent-catalog-apply; portfolio-wide consistency (spec/claude/skill-vs-agent/ §Portfolio-wide consistency) favours the same artefact type.
• Counter-dimension considered. A narrower agent could specialise on per-page frontmatter rewriting and gain on context-window protection, but the high-impact part is the per-block approval dialogue and the audience-artefact patch — both load-bearing on user judgement, not mechanical generation; skill wins.

User-language policy

Detect the user's language from their message and respond in it. Generated artefacts (docs/<lang>/ frontmatter, content-block placeholder pages, audience-artefact patches) are written in the language the surrounding docs/<lang>/ tree uses; the track: and content_mode: keys are English-only because they're enumeration values, not prose.

Tools used

Tools this skill uses: Read, Write, Edit, Glob, Grep, Bash.

• Read / Glob / Grep for repository inspection (docs/<lang>/ trees, page frontmatter, audience artefact, marker files that indicate active extension specs).
• Write / Edit for scaffold and patch operations on per-page frontmatter, content-block placeholder pages, and the audience artefact; never overwriting an existing audience artefact wholesale (delegate that to audience-identify).
• Bash is necessary for mkdocs build --strict verification after migrations and for git rev-parse --is-inside-work-tree precondition. No destructive bash (no git push, no gh pr create, no rm).
• No WebFetch / WebSearch: the spec is the only source of truth.

Preconditions

Before doing anything:

1. Confirm the working directory is a git repository (git rev-parse --is-inside-work-tree).
2. Locate spec/project/docs-audience-tracks/<canonical_language>.md — either in the target repo or via the nolte-shared plugin. If neither is reachable, stop and ask the user which spec source to use.
3. Locate the audience artefact per spec/project/audience-identification/ §Artifact location (AUDIENCES.md at the bounded-context root, or the documented alternative). If the artefact is missing, stop and route the user to the audience-identify skill — this skill cannot proceed without an authoritative audience list.
4. Locate mkdocs.yml and derive the language list. If mkdocs.yml is absent, route the user to mkdocs-structure-apply first.
5. Resolve the operation:
   • User asked for a read-only audit → audit.
   • docs/<lang>/ pages mostly lack track: frontmatter (>50% missing) → migrate is the default (subject to user confirmation).
   • Single finding to fix → patch.
6. Check for uncommitted changes in docs/, the audience artefact, and mkdocs.yml. If the tree is dirty there, report and ask whether to stash, commit, or abort — never overwrite uncommitted work.

Operations

1. audit (read-only)

Walk through the spec's Acceptance Criteria one item at a time, classify each finding as pass, missing, or drift. Group findings by spec area:

• Track frontmatter (per spec/project/docs-audience-tracks/ §Per-page contract): every page under docs/<lang>/ outside _-prefixed snippet folders carries track: whose value is user-docs, developer-docs, or an explicitly opted-in extension value. Report:
  • Missing-key findings.
  • Unrecognised-value findings.
• Audience-to-track mapping (per §Audience-to-track mapping): the audience artefact maps every listed audience to exactly one canonical track, or carries an explicit omission note for an unserved track. Verify the default mapping (user → user-docs; contributor / operator / release-manager → developer-docs) when the artefact doesn't override.
• User-docs content contract (per §User-docs content contract; skip when the audience artefact opts out of user-docs): the four MUST blocks (installation / onboarding, value proposition, audience, use cases) are present and reachable from the Home page within one navigation step. The two SHOULD blocks (quickstart, troubleshooting) are reported as suggestions, not failures.
• Developer-docs content contract (per §Developer-docs content contract; skip when the audience artefact opts out of developer-docs): the three MUST blocks (setup / prerequisites, tech-stack, interfaces / contracts) are present and reachable from the Home page within one navigation step. The four SHOULD blocks (architecture overview, glossary, troubleshooting, contribution flow) are reported as suggestions.
• Content-mode mapping (per §Content-mode mapping): every page declares track and content_mode independently; no page infers one from the other. Cross-check against the audience-track mismatch heuristic (audience value mapping to a different track than the page's track value) — report each mismatch.
• Home-page contract (per §Home-page contract): when the repository serves both tracks, the Home page (docs/<lang>/index.md) names both tracks in routing prose.

Audit is read-only — never autofix during audit.

2. migrate (brownfield: most pages lack track:)

For each step below, confirm with the user per file or per group before writing.

• For every page under docs/<lang>/ (outside _-prefixed snippet folders): propose adding track: to its frontmatter. Default the value from the page's path and existing audience frontmatter via the portfolio-baseline default mapping; never invent. When neither the path nor audience gives a deterministic answer, propose track: # TODO: confirm and ask the user inline.
• For every track the audience artefact serves and that lacks one of the MUST content blocks: scaffold a placeholder page at a stable location (docs/<lang>/getting-started/installation.md for installation, docs/<lang>/index.md H2 sections for value proposition / audience / use cases, docs/<lang>/getting-started/setup.md for setup, …). Write only the container plus the per-page frontmatter contract — page-content authoring belongs to the audience-doc-author agent or the human author.
• Patch the audience artefact to add the track: field next to each audience entry. When the artefact uses a structured table or list form (per the audience-identify skill's template), insert the new field in the right column or sub-bullet. When the artefact lacks a track field shape entirely, propose extending it and route the user to re-run audience-identify's validate operation afterwards.
• When the repository serves both tracks but the Home page doesn't route between them, propose a one-paragraph addition to the Home page that points end users at the user-docs entry and contributors at the developer-docs entry.
• After every successful write, re-run mkdocs build --strict so the user sees the change verified end-to-end. A failing build stops the operation and surfaces the raw output verbatim; never claim success on a red build.

3. patch (additive: a single finding from a prior audit)

For each missing or drift finding from an audit run, propose the exact change and ask the user to approve it before writing. Don't bundle unrelated changes into a single approval step.

• Missing track: on a page: propose the value via the default mapping, surface the rationale, request approval.
• Unrecognised track: value: surface the value, list the legal enumeration, request approval for a replacement.
• Missing MUST content block: propose the placeholder page (containers only, no prose), request approval.
• Audience-track mismatch: surface the conflict, propose two resolutions (change track: on the page, or change the audience-artefact entry), request the user's decision.
• Audience artefact missing track: fields: route the user to audience-identify to add them through the canonical methodology, rather than patching the artefact from this skill.

Output contract

The skill returns to the user, in this order:

1. Operation + target: which operation ran (audit / migrate / patch), absolute target repo root, detected language list, detected audience artefact location.
2. Pre-state: brief summary of what was found (audience artefact present? track: coverage percentage across docs/<lang>/? both tracks served per audience artefact?).
3. Audit findings (always): grouped per spec area, with one row per Acceptance-Criteria item showing status (pass / missing / drift) and a one-line evidence snippet.
4. Planned edits (for migrate / patch): list of files to create or modify, one line per file, with rationale linking back to the spec line.
5. Approval gate (for migrate / patch): explicit user-decision point; nothing is written until the user confirms.
6. Applied edits (after approval): list of files actually written, with absolute paths.
7. Build verification: mkdocs build --strict exit code plus a raw output snippet on failure; on success report the build summary line only.
8. Caller follow-ups: explicit list — commit the working-tree edits, dispatch audience-doc-author to fill in the placeholder pages' bodies, route to audience-identify if the audience artefact needs the track: field added through the canonical methodology, open the PR via pull-request-create, and similar.

Gotchas

• Dirty docs/ tree blocks the operation: if uncommitted changes exist in docs/<lang>/, the audience artefact, or mkdocs.yml when the skill starts, it stops and asks — never assume the tree is clean; always run the precondition check (step 6) before proposing any edits.
• Frontmatter race condition when the audience artefact is extended mid-flow: if the audience artefact gains a new audience entry while a migrate is in progress, pages already proposed with the old mapping may be misclassified — re-read the artefact at the start of each per-page approval step when the session spans multiple turns.
• Multilingual symmetry is mandatory: adding track: to a page in the canonical language tree without patching every counterpart in every other language tree configured in spec/.spec-config.yml is a spec violation (Hard rule 8); always enumerate all configured languages before writing the first page.

Examples

• Read examples/01-audit-track-coverage.md when running a read-only audit and classifying each Acceptance-Criteria item as pass / missing / drift across a bilingual docs tree.
• Read examples/02-migrate-brownfield-tree.md when running migrate on a brownfield tree where most pages lack track: frontmatter, under per-file approval and symmetric across languages.
• Read examples/03-patch-audience-track-mismatch.md when running patch on a single audience-track mismatch finding and offering the two resolutions before writing.

Resumability

Per spec/claude/resumable-work/, this skill is resumable: true. State is persisted to .resume/docs-audience-tracks-apply/<run-id>.yml after every successful user-approval gate and after each named phase boundary. On re-invocation, scan that directory for files with status: in_progress whose inputs: snapshot matches the current invocation; if one matches, prompt the operator with Resume run <run_id> from phase <phase> (last checkpoint <last_checkpoint_at>)? [resume / start-new / discard]. The state-file envelope (schema_version, run_id, inputs, phase, decisions[], status, ...) and the fail-closed semantics on schema or YAML errors are load-bearing in the spec; don't duplicate those rules here.

Hard rules

1. Never author the prose body of a content block. The skill creates the containers (placeholder pages with frontmatter, the H1, and a single-paragraph stub naming the block's purpose), but never the prose. Block authoring belongs to the audience-doc-author agent or the human author.
2. Never invent a track: value when neither the path nor audience gives a deterministic mapping. The fallback is track: # TODO: confirm plus an inline question to the user.
3. Never rewrite the audience artefact wholesale. Inline patches (adding a track: field next to an existing entry) are permitted; structural rewrites belong to audience-identify.
4. Never modify content outside docs/<lang>/, the audience artefact, and (when explicitly approved) the Home page's routing paragraph. Theme, palette, nav order, and plugin baseline belong to mkdocs-structure-apply.
5. Always read the spec at runtime: prefer the target repo's spec/project/docs-audience-tracks/<canonical_language>.md; fall back to the copy shipped by the nolte-shared plugin only when the target repo lacks one. Never carry a baked-in copy inside the skill itself.
6. Always verify the build after every write: mkdocs build --strict must run green before the operation ends. A red build stops the operation.
7. Always preserve existing frontmatter keys when patching track: onto a page that already has title / audience / content_mode / last_updated. Add track: in its canonical position (between content_mode and last_updated) without touching the other keys.
8. Always apply content-block scaffolds and frontmatter patches symmetrically across every language tree configured in spec/.spec-config.yml's languages list, per spec/project/docs-multilingual-authoring/ §Authoring protocol. Adding a track: key to docs/<canonical_language>/foo.md without applying the same patch to every counterpart in docs/<other_language>/foo.md is a violation; scaffolding a placeholder block in one language tree without writing the counterpart in every other configured language tree is a violation.

Sources

• spec/project/docs-audience-tracks/ — the canonical authoritative spec this skill operationalises
• spec/project/mkdocs-structure/ — the per-page frontmatter MUST set (title, audience, content_mode, track, last_updated) and the seven-section nav baseline
• spec/project/audience-identification/ — the audience artefact this skill consumes and patches
• spec/claude/skill-vs-agent/ — the skill-vs-agent decision dimensions that justify this artefact as a skill, not an agent