/**
 * Generate (and verify) the cordis events and services catalogs in
 * docs/cordis-catalog/events.md and docs/cordis-catalog/services.md.
 *
 * The two pages are the WIRING-axis reference, one axis each: every cordis
 * event a plugin can listen to (exact signature + dispatch mode) and every
 * `ctx.<key>` service it can call (exact public interface). They complement the
 * core-data-structures catalog (the VOCABULARY axis — the types these
 * signatures move around).
 *
 * The catalogs are FULLY GENERATED from source — never hand-edit them. The
 * codebase is disciplined enough that a pure-AST pass captures the whole
 * truthful surface: every event/service is a string literal that round-trips
 * to a static `interface Events` / `interface Context` declaration (no
 * dynamically-named events, no runtime-only services). So the committed files
 * are build artifacts and a regenerate-and-diff freshness check (`--check`)
 * makes drift structurally impossible. Because generation enumerates source
 * rather than checking a hand-written subset, a brand-new event cannot be
 * silently undocumented — it appears in the next regenerate, and an
 * un-regenerated file fails `--check`.
 *
 *   `tsx scripts/gen-cordis-catalog.ts`          → write both catalogs
 *   `tsx scripts/gen-cordis-catalog.ts --check`  → exit 1 if a committed
 *                                                  catalog is stale (CI /
 *                                                  pre-push gate)
 *
 * The HARNESS tier (the `@deepseek-ai/dsh-*` events + services) is rendered in
 * full from source: signature, the `@mode` badge, and the declaration's JSDoc.
 * Every harness event MUST carry an `@mode emit|waterfall|parallel|serial` tag
 * — the generator hard-errors on a missing tag, and where the signature shape is
 * conclusive (a trailing `next: () => …` parameter is structurally a waterfall)
 * it asserts the tag agrees and hard-errors on a contradiction. Beyond the tag,
 * the walk enforces JSDoc COMPLETENESS on the whole harness surface (the
 * jsdoc-completeness-gate RFC): every event and public service method carries
 * description prose; every payload parameter has a non-empty `@param` (`this`
 * receivers and the trailing waterfall `next` are exempt — next's semantics are
 * documented once by the mode); a service method with a non-`void`/
 * `Promise<void>` return carries a non-empty `@returns` and needs an EXPLICIT
 * return type annotation (a pure-AST walk cannot classify an inferred return);
 * a stale `@param` naming no real parameter errors. Violations aggregate into
 * ONE error listing every offender. The tags are enforcement-only: parseJsDoc
 * stops prose at the first block tag, so they never change the rendered
 * catalog. The parsing + check helpers live in `scripts/jsdoc.ts`, shared with
 * the whole-export-surface gate (`scripts/verify-export-jsdoc.ts`) so
 * "documented" means the same thing on both surfaces. The INHERITED
 * tier (cordis core + loader/hmr/timer) is pinned vendor source a plugin author
 * also sees; it is rendered tersely (name + one-line + source pointer) from a
 * curated table in this script, NOT elevated to the harness tier's prominence.
 *
 * Signature fences use the ` ```ts cordis-catalog ` info string: doc-typecheck
 * recognizes it and skips compilation (the signatures are fragments, not
 * standalone-compilable, like the ` ```ts type-equiv ` blocks).
 */

import { globSync, readFileSync, writeFileSync } from 'node:fs'
import { resolve } from 'node:path'
import ts from 'typescript'
import { checkParams, checkReturns, parseJsDoc, parseTags, pointer, rawJsDoc, reportViolations, type Mode } from './jsdoc.ts'

const root = resolve(import.meta.dirname, '..')
const OUT_EVENTS = 'docs/cordis-catalog/events.md'
const OUT_SERVICES = 'docs/cordis-catalog/services.md'

/** The fenced-block info string for generated signature blocks (skipped by
 * doc-typecheck, since a bare signature fragment is not standalone-compilable). */
const FENCE = 'ts cordis-catalog'

/**
 * Cross-link map: a type name that appears in a signature → the
 * core-data-structures page that documents it (path relative to the catalogs'
 * folder).
 * Hand-curated and catalog-owned, NOT derived from type-equiv.manifest.json —
 * that manifest documents the `…Map` symbols (`ContentBlockMap`) while
 * signatures reference the derived UNION names (`ContentBlock`), and it lists a
 * few symbols on two pages. Here each name resolves to exactly one PRIMARY page.
 * Shared with `gen-config-catalog.ts` (each caller prefixes its own relative
 * path to `core-data-structures/`), so both catalogs cross-link identically.
 * TODO(catalog-type-links): add a verifier or generator for link-map coverage
 * so new hook-era decision types like `PromptDecision` / `PreToolDecision` do
 * not silently appear in signatures without a "Types:" link.
 */
export const LINK_MAP: Record<string, string> = {
  Agent: 'core.md',
  ContentBlock: 'core.md',
  Message: 'core.md',
  MessageSource: 'core.md',
  GenerateOptions: 'core.md',
  LlmCallConfig: 'core.md',
  SessionEvent: 'core.md',
  StreamChunk: 'llm-streaming.md',
  TurnEndReason: 'session.md',
  ToolDefinition: 'tools.md',
  ToolExecution: 'tools.md',
  ToolExecutionResult: 'tools.md',
  ApprovalOutcome: 'approval.md',
  ApprovalPolicy: 'approval.md',
  ApprovalRequest: 'approval.md',
  BashExecRequest: 'bash.md',
  BashExecSpec: 'bash.md',
  BashRunResult: 'bash.md',
  BashTask: 'bash.md',
  BashTaskRead: 'bash.md',
  ConfinedArgv: 'sandbox.md',
  SandboxMode: 'sandbox.md',
  SandboxPolicy: 'sandbox.md',
  CodeRunRequest: 'code-runtime.md',
  CodeRunResult: 'code-runtime.md',
  FsEditOutcome: 'filesystem.md',
  FsEditRequest: 'filesystem.md',
  FsInfo: 'filesystem.md',
  FsTarget: 'filesystem.md',
  FsVersion: 'filesystem.md',
  FsWriteIntent: 'filesystem.md',
  FsWriteOutcome: 'filesystem.md',
  FsPolicyExec: 'filesystem.md',
  FileReadOutcome: 'filesystem.md',
}

/** One harness event, extracted from an `interface Events` block. */
interface EventEntry {
  /** Scoped name, e.g. `agent/request`. */
  name: string
  /** The scope prefix, e.g. `agent` (everything before the first `/`). */
  scope: string
  /** Full signature text (the method-signature member, JSDoc stripped). */
  signature: string
  /** Dispatch mode from the `@mode` tag. */
  mode: Mode
  /** Description prose (JSDoc minus the `@mode` tag), one line per paragraph. */
  doc: string
  /** Source pointer `packages/…/file.ts:line` of the declaration. */
  source: string
}

/** One harness service, extracted from an `interface Context` block. */
interface ServiceEntry {
  /** The `ctx.<key>` name, e.g. `llm`. */
  key: string
  /** The service class/interface name, e.g. `LlmService`. */
  type: string
  /** Whether the service class is abstract (a seam interface). */
  abstract: boolean
  /** Class-level JSDoc prose, one line per paragraph. */
  doc: string
  /** Public method signatures (bodies stripped), in source order. */
  methods: string[]
  /** Source pointer of the class declaration. */
  source: string
}

/** A terse inherited-tier entry (pinned vendor surface). */
interface InheritedEntry {
  name: string
  summary: string
  /** Source pointer `vendor/…:line`. */
  source: string
}

/** Find the `declare module 'cordis'` body in a source file, or null. */
function cordisModuleBody(sf: ts.SourceFile): ts.ModuleBlock | null {
  for (const stmt of sf.statements) {
    if (ts.isModuleDeclaration(stmt) && ts.isStringLiteral(stmt.name) && stmt.name.text === 'cordis') {
      if (stmt.body && ts.isModuleBlock(stmt.body)) return stmt.body
    }
  }
  return null
}

/** The signature text of a method-signature member (everything but a body). */
function memberSignature(member: ts.TypeElement | ts.ClassElement, sf: ts.SourceFile): string {
  const full = member.getText(sf)
  const body = (member as { body?: ts.Node }).body
  const sig = body ? full.slice(0, full.length - body.getText(sf).length) : full
  return sig.replace(/\s*;?\s*$/, '').replace(/\s+/g, ' ').trim()
}

/** Walk every harness `interface Events` block and extract its events, hard-
 * erroring (aggregated) on any JSDoc-completeness violation: a missing/
 * contradicted `@mode`, missing description prose, or an undocumented payload
 * parameter. `scanRoot` defaults to the repo root; tests pass a fixture dir. */
export function collectEvents(scanRoot: string = root): EventEntry[] {
  const entries: EventEntry[] = []
  const violations: string[] = []
  for (const rel of globSync('packages/*/*/src/*.ts', { cwd: scanRoot }).sort()) {
    const abs = resolve(scanRoot, rel)
    const text = readFileSync(abs, 'utf8')
    if (!text.includes('interface Events')) continue
    const sf = ts.createSourceFile(abs, text, ts.ScriptTarget.Latest, true)
    const body = cordisModuleBody(sf)
    if (!body) continue
    for (const stmt of body.statements) {
      if (!ts.isInterfaceDeclaration(stmt) || stmt.name.text !== 'Events') continue
      for (const member of stmt.members) {
        if (!ts.isMethodSignature(member)) continue
        const name = ts.isStringLiteral(member.name) ? member.name.text : member.name.getText(sf)
        const signature = memberSignature(member, sf)
        const raw = rawJsDoc(text, member)
        const { doc, mode } = parseJsDoc(raw)
        const src = pointer(rel, sf, member)
        const where = `event '${name}' (${src})`
        if (!mode) {
          violations.push(`${where} is missing an @mode tag. Add '@mode emit|waterfall|parallel|serial' to its JSDoc (see AGENTS.md).`)
        }
        // Conclusive structural check: a trailing `next: () => …` parameter is a
        // waterfall. (emit vs parallel vs serial is not structurally
        // distinguishable, so it is trusted from the tag.)
        const last = member.parameters.at(-1)
        const hasNext = !!last && last.name.getText(sf) === 'next'
        if (mode && hasNext && mode !== 'waterfall') {
          violations.push(`${where} has a trailing 'next' parameter (structurally a waterfall) but is tagged '@mode ${mode}'. Fix the tag or the signature.`)
        }
        if (mode && !hasNext && mode === 'waterfall') {
          violations.push(`${where} is tagged '@mode waterfall' but has no trailing 'next' parameter. A waterfall delegates via next().`)
        }
        if (!doc) violations.push(`${where} has no description prose. Say what happened / what a listener may do, above the block tags.`)
        // Payload parameters need a non-empty @param each. Exempt the `this`
        // receiver annotation (not payload) and the trailing waterfall `next`
        // (mode machinery, documented once by @mode semantics). Documenting an
        // exempt parameter anyway is allowed — only absence is checked.
        const { params } = parseTags(raw)
        checkParams(where, 'event', member.parameters, params, sf,
          p => (ts.isIdentifier(p.name) && p.name.text === 'this') || (hasNext && p === last), violations)
        if (mode) entries.push({ name, scope: name.split('/')[0] ?? name, signature, mode, doc, source: src })
      }
    }
  }
  reportViolations('gen-cordis-catalog', violations)
  return entries
}

/** Walk every harness `interface Context` block + its service class, hard-
 * erroring (aggregated) on any JSDoc-completeness violation: a class or public
 * method without JSDoc prose, an undocumented parameter, a stale `@param`, a
 * missing `@returns` on a non-void method, or an inferred (unannotated) return
 * type the pure-AST walk cannot classify.
 * `scanRoot` defaults to the repo root; tests pass a fixture dir. */
export function collectServices(scanRoot: string = root): ServiceEntry[] {
  const entries: ServiceEntry[] = []
  const violations: string[] = []
  for (const rel of globSync('packages/*/*/src/index.ts', { cwd: scanRoot }).sort()) {
    const abs = resolve(scanRoot, rel)
    const text = readFileSync(abs, 'utf8')
    if (!text.includes('interface Context')) continue
    const sf = ts.createSourceFile(abs, text, ts.ScriptTarget.Latest, true)
    const body = cordisModuleBody(sf)
    if (!body) continue
    // The ctx key → type mapping(s) declared in this file's interface Context.
    const keyToType = new Map<string, string>()
    for (const stmt of body.statements) {
      if (!ts.isInterfaceDeclaration(stmt) || stmt.name.text !== 'Context') continue
      for (const member of stmt.members) {
        if (!ts.isPropertySignature(member) || !member.type) continue
        const key = member.name.getText(sf)
        keyToType.set(key, member.type.getText(sf))
      }
    }
    if (keyToType.size === 0) continue
    // Find each service class declared in the same file and emit an entry.
    for (const [key, type] of keyToType) {
      const cls = sf.statements.find(
        (s): s is ts.ClassDeclaration => ts.isClassDeclaration(s) && s.name?.text === type,
      )
      if (!cls) continue // a Pick-mixin member (e.g. timer helpers), not a class here
      const abstract = cls.modifiers?.some(m => m.kind === ts.SyntaxKind.AbstractKeyword) ?? false
      const clsDoc = parseJsDoc(rawJsDoc(text, cls)).doc
      if (!clsDoc) violations.push(`service ctx.${key} (${pointer(rel, sf, cls)}): class ${type} has no JSDoc.`)
      const methods: string[] = []
      for (const member of cls.members) {
        if (!ts.isMethodDeclaration(member)) continue
        // Only the PUBLIC callable surface a `ctx.<key>` consumer sees. Drop
        // private/protected (a protected method like `notifyTaskDone` is a
        // subclass hook, not something a plugin calls through `ctx.bash`) and
        // static (not reachable through the instance).
        const nonPublic = member.modifiers?.some(m =>
          m.kind === ts.SyntaxKind.PrivateKeyword
          || m.kind === ts.SyntaxKind.ProtectedKeyword
          || m.kind === ts.SyntaxKind.StaticKeyword)
          || ts.isPrivateIdentifier(member.name)
        if (nonPublic) continue
        const memberName = member.name.getText(sf)
        if (memberName.startsWith('[')) continue // computed/symbol members
        methods.push(memberSignature(member, sf))
        const where = `service method ctx.${key}.${memberName} (${pointer(rel, sf, member)})`
        const raw = rawJsDoc(text, member)
        if (!raw) { violations.push(`${where} has no JSDoc.`); continue }
        if (!parseJsDoc(raw).doc) violations.push(`${where} has no description prose above its block tags.`)
        const { params, returns } = parseTags(raw)
        // Every parameter needs a non-empty @param (`this` receiver exempt),
        // and a non-void ANNOTATED result needs a non-empty @returns — the
        // shared checkers carry the exact contract.
        checkParams(where, 'service', member.parameters, params, sf,
          p => ts.isIdentifier(p.name) && p.name.text === 'this', violations)
        checkReturns(where, member.type, returns, sf, violations)
      }
      entries.push({
        key,
        type,
        abstract,
        doc: clsDoc,
        methods,
        source: pointer(rel, sf, cls),
      })
    }
  }
  reportViolations('gen-cordis-catalog', violations)
  return entries.sort((a, b) => a.key.localeCompare(b.key))
}

/**
 * The inherited tier — cordis core + loader/hmr/timer. Curated, terse, and
 * hand-summarized because (a) it is pinned vendor source that changes only on a
 * deliberate vendor sync, (b) the cordis-core `Context` mixes true ctx members
 * with non-service fields (`root`, `baseUrl`, `logger`) that a blind walk would
 * wrongly surface as services, and (c) the internal/* events carry no JSDoc to
 * render. Source pointers are verified against vendor by `verify-md-links`'
 * sibling check is N/A; keep them current on a vendor bump.
 */
const INHERITED_EVENTS: InheritedEntry[] = [
  { name: 'internal/plugin', summary: 'A plugin fiber was created.', source: 'vendor/cordis/src/events.ts:197' },
  { name: 'internal/status', summary: 'A fiber changed lifecycle state.', source: 'vendor/cordis/src/events.ts:198' },
  { name: 'internal/service', summary: 'Interception hook for a service binding (no core producer).', source: 'vendor/cordis/src/events.ts:199' },
  { name: 'internal/update', summary: 'Waterfall: a fiber config update is being applied.', source: 'vendor/cordis/src/events.ts:200' },
  { name: 'internal/get', summary: 'Waterfall: a service is being read from the store.', source: 'vendor/cordis/src/events.ts:201' },
  { name: 'internal/set', summary: 'Waterfall: a service is being written to the store.', source: 'vendor/cordis/src/events.ts:202' },
  { name: 'internal/listener', summary: 'A listener was registered.', source: 'vendor/cordis/src/events.ts:203' },
  { name: 'internal/dispatch', summary: 'An event is being dispatched to listeners.', source: 'vendor/cordis/src/events.ts:204' },
  { name: 'hmr/change', summary: 'A watched source file changed on disk.', source: 'vendor/hmr/src/index.ts:20' },
  { name: 'hmr/reload', summary: 'Plugins are being reloaded after a change.', source: 'vendor/hmr/src/index.ts:21' },
  { name: 'exit', summary: 'The process is exiting on a signal.', source: 'vendor/loader/src/index.ts:23' },
  { name: 'loader/config-update', summary: 'The loader config tree changed.', source: 'vendor/loader/src/index.ts:24' },
  { name: 'loader/entry-init', summary: 'A config entry is being initialized.', source: 'vendor/loader/src/index.ts:25' },
  { name: 'loader/partial-dispose', summary: 'An entry is being partially disposed on reload.', source: 'vendor/loader/src/index.ts:26' },
  { name: 'loader/patch-context', summary: 'A context is being patched during a reload.', source: 'vendor/loader/src/index.ts:27' },
]

export const INHERITED_SERVICES: InheritedEntry[] = [
  { name: 'ctx.on / ctx.once', summary: 'Register an event listener (disposable).', source: 'vendor/cordis/src/events.ts:29' },
  { name: 'ctx.emit / ctx.parallel / ctx.serial / ctx.bail / ctx.waterfall', summary: 'Dispatch an event (sync / awaited / first-bail / veto-chain).', source: 'vendor/cordis/src/events.ts:29' },
  { name: 'ctx.plugin / ctx.inject', summary: 'Load a plugin / declare required services.', source: 'vendor/cordis/src/registry.ts:144' },
  { name: 'ctx.effect', summary: 'Register a disposable side effect tied to the fiber.', source: 'vendor/cordis/src/fiber.ts:9' },
  { name: 'ctx.get / ctx.set / ctx.provide / ctx.accessor / ctx.mixin', summary: 'Low-level service-store access and binding.', source: 'vendor/cordis/src/reflect.ts:7' },
  { name: 'ctx.extend / ctx.isolate / ctx.intercept', summary: 'Derive a child context (scoped services / isolation / interception).', source: 'vendor/cordis/src/context.ts:35' },
  { name: 'ctx.root / ctx.scope / ctx.fiber / ctx.registry / ctx.reflect / ctx.events / ctx.logger', summary: 'Ambient handles onto the running context graph.', source: 'vendor/cordis/src/context.ts:16' },
  { name: 'ctx.timer (+ interval / timeout / throttle / debounce / setTimeout / setInterval)', summary: 'Disposable timer helpers. The `timer` key is provided at runtime; the six helpers are mixed onto ctx directly (declared via Pick).', source: 'vendor/timer/src/index.ts:4' },
  { name: 'ctx.loader', summary: 'The config Loader that booted the app (present under the loader).', source: 'vendor/loader/src/index.ts:30' },
  { name: 'ctx.hmr', summary: 'The hot-module-reload watcher (present under the hmr plugin).', source: 'vendor/hmr/src/index.ts:15' },
]

/** Render the cross-link "Types:" line for a signature, or '' if none apply. */
function typeLinks(signature: string): string {
  const seen = new Set<string>()
  for (const name of Object.keys(LINK_MAP)) {
    if (new RegExp(`\\b${name}\\b`).test(signature)) seen.add(name)
  }
  if (seen.size === 0) return ''
  const links = [...seen].sort().map(n => `[${n}](../core-data-structures/${LINK_MAP[n]})`)
  return `Types: ${links.join(' · ')}`
}

/** Render one harness event entry. */
function renderEvent(e: EventEntry): string[] {
  const out = [`### \`${e.name}\` — ${e.mode}`, '']
  if (e.doc) out.push(e.doc, '')
  out.push('```' + FENCE, e.signature, '```', '')
  const links = typeLinks(e.signature)
  if (links) out.push(links, '')
  out.push(`Source: [\`${e.source}\`](../../${e.source.split(':')[0]})`, '')
  return out
}

/** Render one harness service entry. */
function renderService(s: ServiceEntry): string[] {
  const kind = s.abstract ? ' (abstract seam)' : ''
  const out = [`## \`ctx.${s.key}\` — \`${s.type}\`${kind}`, '']
  if (s.doc) out.push(s.doc, '')
  if (s.methods.length) {
    out.push('```' + FENCE, ...s.methods, '```', '')
    const links = typeLinks(s.methods.join('\n'))
    if (links) out.push(links, '')
  }
  out.push(`Source: [\`${s.source}\`](../../${s.source.split(':')[0]})`, '')
  return out
}

/** The shared generated-file banner comment. */
const BANNER = [
  '<!-- Generated by scripts/gen-cordis-catalog.ts — do not edit by hand.',
  '     Run `pnpm run gen-cordis-catalog` to regenerate. -->',
  '',
]

/** The shared GENERATED + freshness-gate + fence notice paragraph. */
const GATE_NOTICE = 'This file is GENERATED from source (`scripts/gen-cordis-catalog.ts`) and verified fresh by `pnpm run verify-cordis-catalog` (part of `doc-sync`) — do not edit it by hand. Signature blocks use a `ts cordis-catalog` fence (skipped by doc-typecheck, since a bare signature is not standalone-compilable). Type names in a signature link to the page that documents them.'

/** Render the events catalog (pure, deterministic given sorted inputs). */
function renderEvents(events: EventEntry[]): string {
  const lines: string[] = [
    ...BANNER,
    '# Cordis Events Catalog',
    '',
    'Every cordis event a plugin can listen to: exact signature, dispatch mode, and the declaration\'s JSDoc. This is one axis of the **wiring** reference a plugin author works against — the callable `ctx.<key>` surface is the sibling [services catalog](services.md), and [core-data-structures/](../core-data-structures/core.md) catalogs the *data structures* these signatures move around.',
    '',
    GATE_NOTICE,
    '',
    'The **harness tier** below (the `@deepseek-ai/dsh-*` packages) is the vocabulary this repo owns, grouped by scope. The **inherited tier** at the end is the cordis-core + loader/hmr/timer event surface a plugin also sees — pinned vendor source, summarized tersely.',
    '',
    'Dispatch modes: **emit** (fire-and-forget), **waterfall** (each listener gets `next()` and may transform or veto — see [waterfall semantics](../cordis-primer.md#cordis-waterfall-semantics)), **parallel** (awaited fan-out; all listeners run), **serial** (awaited in registration order until one returns a bail value — anything other than `null`, `false`, or `undefined`).',
    '',
  ]
  const scopes = [...new Set(events.map(e => e.scope))].sort()
  for (const scope of scopes) {
    lines.push(`## \`${scope}/*\``, '')
    for (const e of events.filter(x => x.scope === scope).sort((a, b) => a.name.localeCompare(b.name))) {
      lines.push(...renderEvent(e))
    }
  }
  lines.push(
    '## Inherited events (cordis core + loader/hmr/timer)',
    '',
    'The framework events every plugin also sees, beyond the harness vocabulary above. This is pinned vendor source ([vendoring policy](../../vendor/README.md)); it is summarized here so the page is a complete picture of the event bus, without elevating framework internals to the harness tier\'s prominence.',
    '',
  )
  for (const e of INHERITED_EVENTS) {
    lines.push(`- \`${e.name}\` — ${e.summary} ([\`${e.source}\`](../../${e.source.split(':')[0]}))`)
  }
  lines.push('')
  return lines.join('\n')
}

/** Render the services catalog (pure, deterministic given sorted inputs). */
function renderServices(services: ServiceEntry[]): string {
  const lines: string[] = [
    ...BANNER,
    '# Cordis Services Catalog',
    '',
    'Every `ctx.<key>` service a plugin can call: the exact public interface plus the class JSDoc. This is one axis of the **wiring** reference a plugin author works against — the events a plugin listens to are the sibling [events catalog](events.md), and [core-data-structures/](../core-data-structures/core.md) catalogs the *data structures* these signatures move around. An abstract seam (e.g. `ctx.bash`) is implemented by a separate package; the interface is what consumers code against.',
    '',
    GATE_NOTICE,
    '',
    'The **harness tier** below (the `@deepseek-ai/dsh-*` packages) is the vocabulary this repo owns. The **inherited tier** at the end is the cordis-core + loader/hmr/timer `ctx` surface a plugin also sees — pinned vendor source, summarized tersely.',
    '',
  ]
  for (const s of services) lines.push(...renderService(s))
  lines.push(
    '## Inherited `ctx` members (cordis core + loader/hmr/timer)',
    '',
    'The framework `ctx` surface every plugin also sees, beyond the harness services above. This is pinned vendor source ([vendoring policy](../../vendor/README.md)); it is summarized here so the page is a complete picture of what `ctx` offers, without elevating framework internals to the harness tier\'s prominence.',
    '',
  )
  for (const s of INHERITED_SERVICES) {
    lines.push(`- \`${s.name}\` — ${s.summary} ([\`${s.source}\`](../../${s.source.split(':')[0]}))`)
  }
  lines.push('')
  return lines.join('\n')
}

/** CLI entry: `--write` (default) writes both catalogs, `--check` fails if
 * either is stale. Guarded behind an entry-point check so importing this module
 * for tests neither regenerates the committed files nor calls process.exit. */
function main(): void {
  const outputs: [string, string][] = [
    [OUT_EVENTS, renderEvents(collectEvents())],
    [OUT_SERVICES, renderServices(collectServices())],
  ]
  if (process.argv.includes('--check')) {
    const stale: string[] = []
    for (const [out, content] of outputs) {
      let committed: string | null = null
      try {
        committed = readFileSync(resolve(root, out), 'utf8')
      } catch {
        // Only ENOENT (not yet generated) is expected; a present-but-unreadable
        // file is not a state this repo produces. Either way the remedy is the
        // same — regenerate — so treat a read failure as "stale".
        committed = null
      }
      if (committed !== content) stale.push(out)
    }
    if (stale.length === 0) {
      console.log(`gen-cordis-catalog: ${OUT_EVENTS} and ${OUT_SERVICES} are up to date.`)
      process.exit(0)
    }
    console.error(`gen-cordis-catalog: ${stale.join(' and ')} ${stale.length === 1 ? 'is' : 'are'} stale. Run \`pnpm run gen-cordis-catalog\` and commit the result.`)
    process.exit(1)
  }

  for (const [out, content] of outputs) writeFileSync(resolve(root, out), content)
  console.log(`gen-cordis-catalog: wrote ${OUT_EVENTS} and ${OUT_SERVICES}.`)
}

// Run only when invoked as a script, not when imported by a test.
if (process.argv[1] && import.meta.filename === resolve(process.argv[1])) {
  main()
}
