Edit Spec

Edit a .spec.ts file to update the project's instruction files. The spec is the source of truth — CLAUDE.md and AGENTS.md are compiled build artifacts that must not be edited directly.

Arguments

$ARGUMENTS — What the user wants to change. Examples:

• "add a rule about always using the custom logger"
• "update the architecture section"
• "add src/services/auth.ts to key files"
• "add npm run lint to commands"
• "change the testing guidance"

Instructions

Step 1: Find the Spec

Look for spec files in the repo root:

• CLAUDE.md.spec.ts — source for CLAUDE.md
• AGENTS.md.spec.ts — source for AGENTS.md
• Any *.spec.ts matching instruction files

If no spec exists: if there's a hand-written CLAUDE.md, suggest the adopt-spec skill; otherwise suggest npx vigiles init to scaffold one.

Step 2: Read and Understand the Spec

Read the spec file. It's a TypeScript file that exports a claude() call with these fields:

import { claude, enforce, guidance, check, every } from "vigiles/spec";

export default claude({
  // Optional: output target (defaults to "CLAUDE.md")
  target: "CLAUDE.md",
  // or multi-target:
  // target: ["CLAUDE.md", "AGENTS.md"],

  // Prose sections — become ## headings in compiled output
  sections: {
    positioning: "What this project does...",
    architecture: "How the codebase is structured...",
  },

  // File paths verified to exist at compile time
  keyFiles: {
    "src/index.ts": "Main entry point",
  },

  // Commands verified against package.json
  commands: {
    "npm run build": "Compile the project",
    "npm test": "Run all tests",
  },

  // Rules — three types
  rules: {
    // enforce() — backed by a linter rule, verified to exist AND be enabled
    "no-any": enforce(
      "@typescript-eslint/no-explicit-any",
      "Use unknown and narrow with type guards.",
    ),

    // check() — filesystem assertion run by vigiles
    "test-pairing": check(
      every("src/**/*.service.ts").has("{name}.test.ts"),
      "Every service must have tests.",
    ),

    // guidance() — prose only, no enforcement
    "research-first": guidance("Google unfamiliar APIs before implementing."),
  },
});

Step 3: Make the Changes

Based on what the user asked for:

Adding a rule (this absorbs the old generate-rule skill):

• Classify the rule from the request:
• enforce() — a linter rule can back it. Check the project's linter configs

(ESLint, Ruff, Clippy, Pylint, RuboCop, Stylelint) for a matching rule; also consider an architectural tool (ast-grep, Dependency Cruiser, Steiger). If uncertain whether a rule exists, ask the user rather than guessing.

• check() — a filesystem structural convention ("every X needs a Y"). Only

for file-pairing; never for code content.

• guidance() — can't be mechanically enforced (subjective conventions,

process rules, migration context).

• For enforce(): use the real linter rule name (e.g. eslint/no-console,

@typescript-eslint/no-explicit-any, ruff/T201).

• Add to the rules object with a kebab-case key derived from the intent,

preserving alphabetical order if the existing rules are alphabetical. Import any new builders needed (e.g. check and every for the first check()).

Updating a section:

• Edit the string in sections. Sections are plain strings or tagged template literals with file(), cmd(), ref() for verified references
• Do NOT add # or ## headers inside sections — they break the document structure

Adding a key file or command:

• Add to keyFiles or commands. The compiler verifies these exist at compile time
• For commands: must match a script in package.json
• For key files: must exist on disk

Step 4: Compile

After editing the spec, run:

npx vigiles compile

This regenerates the compiled instruction file(s). Review the output for any errors:

• stale-file — a key file path doesn't exist
• stale-command — a command isn't in package.json
• invalid-rule — a linter rule doesn't exist or is disabled
• section-has-header — a section contains # headers (break into separate named sections)

Step 5: Verify

npx vigiles lint

If the vigiles plugin is installed (/plugin marketplace add zernie/vigiles then /plugin install vigiles@vigiles, or npx vigiles init), the PostToolUse hook recompiles automatically after you save the spec.

Important

• Do what's asked; don't silently escalate enforcement. Add the rule the user asked for. If making it an enforce() would need a linter-config edit or a plugin install (a cost), or if it could fail a clean CI, say so and let the user choose — don't change linter config or flip on strict / workflow gating on your own. A pure win (a rule that's already enabled) you can just apply. The strengthen skill owns guidance() → enforce() upgrades.
• Never edit CLAUDE.md or AGENTS.md directly — they have a vigiles hash comment and are build artifacts
• The spec is TypeScript — you get type checking, autocomplete, and verified references
• enforce() rules are verified — the compiler checks the rule exists AND is enabled in your linter config
• Sections must not contain # or ## headers — use separate named sections instead

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: zernie
• Source: zernie/vigiles
• License: MIT
• Homepage: https://vigiles.sh

Install and usage instructions live in the source repository linked above.