askit-build-skill

name	askit-build-skill
description	Creates and improves agentskills.io skills to the Advanced Skill Library Standard. Use when you need to author a new SKILL.md, scaffold a skill directory, or raise an existing skill's conformance and description quality.
metadata	{"version":"0.1.3","tier":"universal","audience":"beginner","chain":"askit-skill-author, askit-reviewer"}

askit-build-skill

Purpose

Author conformant skills. Two modes: create scaffolds a new skill that passes Bronze on first run; improve raises an existing skill toward the quality bar. Authoring depth is in references/authoring-guide.md.

When to use

When the user asks to create, scaffold, write, or improve a skill.

create mode

1. Brief interview: ask for the skill name (kebab-case), what it does, when to use it, and a few trigger keywords. Skip the interview if these inputs are already provided in context.
2. Delegate the drafting to the askit-skill-author subagent (the declared chain) when running in a harness that can dispatch it; otherwise perform the steps below inline. Either way the procedure is the same: create skills/<name>/ and copy templates/SKILL.md into skills/<name>/SKILL.md.
3. Fill the frontmatter: name equal to the directory, and a description that states what AND when with concrete keywords (see references/authoring-guide.md for the bar).
4. Scaffold references/ if the skill needs depth. Samples in examples/ are optional at Bronze - add them only if useful. Do not assume the surrounding plugin anatomy exists - this skill works a la carte.
5. Emit native manifests for the declared targets: set agent-targets in the plugin's library.json (for example ["claude", "codex"]), then run node scripts/generators/gen-manifest.mjs <plugin-root> --write --target=all. To emit for one agent only, pass --target=claude or --target=codex. The plugin's library.json agent-targets (not a CLI flag) declares which targets it requires; gen-manifest writes .claude-plugin/plugin.json and/or .codex-plugin/plugin.json from library.json.
6. Assess the new skill with node scripts/evaluate.mjs skills/<name> --json (this is what the askit-evaluate skill runs), report the result, and iterate until it passes with 0 errors.

improve mode

1. Run node scripts/evaluate.mjs <skill> --json and read the report. As in create mode, the rewrite work itself may be delegated to askit-skill-author or done inline; the steps below are the procedure either way.
2. For each finding: a samples warn -> add representative examples; a low description score (U5) -> rewrite the description to clear the bar; an over-budget warning (U7) -> move depth into references/. For any other finding, read its message and apply the fix it states.
3. Re-run evaluate to confirm the findings are resolved. That closes phase 1 (conformance).

improve mode, phase 2: the craft review (optional)

Phase 1 proves the skill obeys the rules. Phase 2 asks whether it is any good as a teacher. It is OPTIONAL, it is OFFERED not assumed, and it never edits meaning. Decision and contract: ADR 0037 (the builder craft pass), docs/internal/decisions/0037-builder-craft-pass-and-safe-judgment-partition.md.

1. Check eligibility. Phase 2 is offered only when the deterministic gate is already clean. Pass the phase-1 gate result ({ exitCode, errors, warns }) to phaseTwoEligible() from scripts/lib/craft-review.mjs. If it returns ineligible, say why and go back to phase 1; the craft pass is never a way around a conformance failure.
2. Offer it, and stop. Tell the user what the craft review costs (one advisory subagent run, see docs/reference/token-usage-estimates.md) and what it produces. Run it only on an explicit yes.
3. Dispatch the reviewer. Delegate to the askit-reviewer subagent (the declared chain), briefed with references/skill-craft-rubric.md. It scores five dimensions - description and trigger quality, instruction clarity, example depth including golden and anti-example presence, reference structure, token economy - and returns findings in the rubric's contract.
4. Render a durable report. Write the findings through toReviewAdvisory() to a JSON file, then render: node scripts/evaluate.mjs <skill> --report=review --advisory <file.json> --format=md --out <report.md> (use --format=html for the shareable page). The craft review is an artifact, not chat output. It renders BESIDE the verdict and cannot change it.
5. Partition. Call partitionCraftFindings(). SAFE is a closed allowlist of three mechanical categories (broken link, formatting, missing bookkeeping frontmatter field), each needing a bounded single-line fix. Everything else, including any category the allowlist does not name, is JUDGMENT.
6. Offer the SAFE subset only, item by item. Show each SAFE fix as the exact before and after. On explicit consent, call applySafeFixes(<skill>, safe, { consent: true }). Without consent: true it writes nothing, and it refuses any finding that is not SAFE even if it is handed one.
7. Report the JUDGMENT findings, do not act on them. Present each with its recommended change and leave the files untouched. If the user asks for one, that is ordinary improve-mode work (step 2), consciously chosen.
8. Re-run the gate (node scripts/evaluate.mjs <skill> --json) to confirm it is still clean after the apply, and say so.

Scope

Emits for Claude and Codex: library.json.agent-targets declares which targets the plugin requires, and gen-manifest.mjs --target=all|claude|codex generates the matching native manifests. This skill delegates authoring to the askit-skill-author subagent (permitted in agents/_chain-permitted.yaml), which in turn delegates assessment to askit-evaluator, and delegates the optional phase-2 craft review to askit-reviewer (the same subagent askit-evaluate uses for its advisory review layer).