feat: add GitHub issue triage workflows

.mux/actions/github/ensureIssueLabels.js

@@ -0,0 +1,76 @@
+const {
+  getIssueView,
+  inputObject,
+  normalizeIssue,
+  repositoryFromInput,
+  requiredIssueNumber,
+  stringList,
+} = require('../../workflow-action-lib/github.cjs');
+
+export const metadata = {
+  version: 1,
+  description: 'Idempotently add and remove GitHub issue labels',
+  effect: 'external',
+  inputSchema: mux.schema.object(
+    {
+      repository: mux.schema.optional(mux.schema.string()),
+      owner: mux.schema.optional(mux.schema.string()),
+      repo: mux.schema.optional(mux.schema.string()),
+      number: mux.schema.integer(),
+      addLabels: mux.schema.optional(mux.schema.array(mux.schema.string())),
+      removeLabels: mux.schema.optional(mux.schema.array(mux.schema.string())),
+    },
+    { additionalProperties: false },
+  ),
+  outputSchema: mux.schema.object(
+    {
+      changed: mux.schema.boolean(),
+      before: mux.schema.array(mux.schema.string()),
+      after: mux.schema.array(mux.schema.string()),
+      added: mux.schema.array(mux.schema.string()),
+      removed: mux.schema.array(mux.schema.string()),
+    },
+    { additionalProperties: false },
+  ),
+  permissions: [
+    { kind: 'command', command: 'gh issue edit' },
+    { kind: 'command', command: 'gh issue view' },
+  ],
+  timeoutMs: 60000,
+};
+
+async function getLabelNames(ctx, repository, number) {
+  const issue = await getIssueView(ctx, repository, number, ['labels']);
+  return normalizeIssue(issue).labelNames;
+}
+
+export async function execute(rawInput, ctx) {
+  const input = inputObject(rawInput);
+  const repository = repositoryFromInput(input);
+  const number = requiredIssueNumber(input.number);
+  const addLabels = stringList(input.addLabels);
+  const removeLabels = stringList(input.removeLabels);
+  const before = await getLabelNames(ctx, repository, number);
+  const missingAddLabels = addLabels.filter((label) => !before.includes(label));
+  const presentRemoveLabels = removeLabels.filter((label) =>
+    before.includes(label),
+  );
+  if (missingAddLabels.length === 0 && presentRemoveLabels.length === 0) {
+    return { changed: false, before, after: before, added: [], removed: [] };
+  }
+  const args = ['issue', 'edit', String(number)];
+  if (repository) args.push('--repo', repository);
+  for (const label of missingAddLabels) args.push('--add-label', label);
+  for (const label of presentRemoveLabels) args.push('--remove-label', label);
+  await ctx.execChecked('gh', args);
+  const after = await getLabelNames(ctx, repository, number);
+  return {
+    changed: true,
+    before,
+    after,
+    added: missingAddLabels,
+    removed: presentRemoveLabels,
+  };
+}
+
+export const reconcile = execute;

.mux/actions/github/findIssueComment.js

@@ -0,0 +1,79 @@
+const {
+  inputObject,
+  listComments,
+  requiredIssueNumber,
+  requiredRepository,
+  splitRepository,
+  stringList,
+} = require('../../workflow-action-lib/github.cjs');
+
+export const metadata = {
+  version: 1,
+  description: 'Find the latest GitHub issue comment containing expected text',
+  effect: 'read',
+  inputSchema: mux.schema.object(
+    {
+      repository: mux.schema.optional(mux.schema.string()),
+      owner: mux.schema.optional(mux.schema.string()),
+      repo: mux.schema.optional(mux.schema.string()),
+      number: mux.schema.integer(),
+      requiredBodyIncludes: mux.schema.optional(
+        mux.schema.array(mux.schema.string()),
+      ),
+    },
+    { additionalProperties: false },
+  ),
+  outputSchema: mux.schema.object(
+    {
+      found: mux.schema.boolean(),
+      reason: mux.schema.string(),
+      url: mux.schema.nullable(mux.schema.string()),
+      commentId: mux.schema.nullable(
+        mux.schema.union([mux.schema.integer(), mux.schema.string()]),
+      ),
+      updatedAt: mux.schema.nullable(mux.schema.string()),
+    },
+    { additionalProperties: false },
+  ),
+  permissions: [{ kind: 'command', command: 'gh api' }],
+  timeoutMs: 60000,
+};
+
+export async function execute(rawInput, ctx) {
+  const input = inputObject(rawInput);
+  const repository = requiredRepository(input);
+  const parts = splitRepository(repository);
+  const number = requiredIssueNumber(input.number);
+  const includes = stringList(input.requiredBodyIncludes);
+  if (includes.length === 0) {
+    throw new Error('requiredBodyIncludes must include at least one string');
+  }
+
+  const comments = await listComments(ctx, parts.owner, parts.repo, number);
+  const match = comments
+    .slice()
+    .reverse()
+    .find(
+      (comment) =>
+        typeof comment.body === 'string' &&
+        includes.every((text) => comment.body.includes(text)),
+    );
+
+  if (!match) {
+    return {
+      found: false,
+      reason: 'not-found',
+      url: null,
+      commentId: null,
+      updatedAt: null,
+    };
+  }
+
+  return {
+    found: true,
+    reason: '',
+    url: match.html_url || null,
+    commentId: match.id || null,
+    updatedAt: match.updated_at || null,
+  };
+}

.mux/actions/github/getIssueAutomationState.js

@@ -0,0 +1,120 @@
+const {
+  getIssueView,
+  inputObject,
+  isMatchingMarker,
+  listComments,
+  markerStatus,
+  normalizeIssue,
+  optionalString,
+  requiredIssueNumber,
+  requiredRepository,
+  requiredString,
+  splitRepository,
+  stringList,
+} = require('../../workflow-action-lib/github.cjs');
+
+export const metadata = {
+  version: 1,
+  description: 'Read GitHub issue automation marker comments and done labels',
+  effect: 'read',
+  inputSchema: mux.schema.object(
+    {
+      repository: mux.schema.optional(mux.schema.string()),
+      owner: mux.schema.optional(mux.schema.string()),
+      repo: mux.schema.optional(mux.schema.string()),
+      number: mux.schema.integer(),
+      doneLabels: mux.schema.optional(mux.schema.array(mux.schema.string())),
+      ongoingLabels: mux.schema.optional(mux.schema.array(mux.schema.string())),
+      includeComments: mux.schema.optional(mux.schema.boolean()),
+      marker: mux.schema.string(),
+      markerKey: mux.schema.string(),
+      promptVersion: mux.schema.optional(mux.schema.string()),
+    },
+    { additionalProperties: false },
+  ),
+  outputSchema: mux.schema.object(
+    {
+      done: mux.schema.boolean(),
+      promptStarted: mux.schema.boolean(),
+      reportPosted: mux.schema.boolean(),
+      labelNames: mux.schema.array(mux.schema.string()),
+      markerComments: mux.schema.array(
+        mux.schema.object(
+          {
+            id: mux.schema.integer(),
+            url: mux.schema.nullable(mux.schema.string()),
+            status: mux.schema.string(),
+          },
+          { additionalProperties: false },
+        ),
+      ),
+    },
+    { additionalProperties: false },
+  ),
+  permissions: [
+    { kind: 'command', command: 'gh api' },
+    { kind: 'command', command: 'gh issue view' },
+  ],
+  timeoutMs: 60000,
+};
+
+function labelsIncludeAll(labels, labelNames) {
+  return (
+    labels.length > 0 && labels.every((label) => labelNames.includes(label))
+  );
+}
+
+function labelsIncludeAny(labels, labelNames) {
+  return labels.some((label) => labelNames.includes(label));
+}
+
+export async function execute(rawInput, ctx) {
+  const input = inputObject(rawInput);
+  const repository = requiredRepository(input);
+  const number = requiredIssueNumber(input.number);
+  const doneLabels = stringList(input.doneLabels);
+  const ongoingLabels = stringList(input.ongoingLabels);
+  const includeComments = input.includeComments !== false;
+  const issuePromise = getIssueView(ctx, repository, number, ['labels']);
+
+  if (!includeComments) {
+    const issue = await issuePromise;
+    const labelNames = normalizeIssue(issue).labelNames;
+    return {
+      done: labelsIncludeAll(doneLabels, labelNames),
+      promptStarted: labelsIncludeAny(ongoingLabels, labelNames),
+      reportPosted: false,
+      labelNames,
+      markerComments: [],
+    };
+  }
+
+  const parts = splitRepository(repository);
+  const marker = requiredString(input.marker, 'marker');
+  const markerKey = requiredString(input.markerKey, 'markerKey');
+  const promptVersion = optionalString(input.promptVersion) || 'v1';
+  const [issue, comments] = await Promise.all([
+    issuePromise,
+    listComments(ctx, parts.owner, parts.repo, number),
+  ]);
+  const labelNames = normalizeIssue(issue).labelNames;
+  const matching = comments.filter((comment) =>
+    isMatchingMarker(comment.body, marker, markerKey, promptVersion),
+  );
+  const statuses = matching
+    .map((comment) => markerStatus(comment.body))
+    .filter(Boolean);
+  return {
+    done: labelsIncludeAll(doneLabels, labelNames),
+    promptStarted:
+      labelsIncludeAny(ongoingLabels, labelNames) ||
+      statuses.includes('prompt-started'),
+    reportPosted: statuses.includes('report-posted'),
+    labelNames,
+    markerComments: matching.map((comment) => ({
+      id: comment.id,
+      url: comment.html_url || null,
+      status: markerStatus(comment.body),
+    })),
+  };
+}