Merge pull request 'The catalogue declares the event it emits on starting' (#129) from fix/the-catalogue-declares-the-event-it-emits into main

Its runtime announces that it has just started and may have missed builds — the event the control
plane follows to replay them — and its manifest did not declare it. A module's authority on the bus
is derived from what it declares, so the publish was refused and the runtime died on start, in a
loop, with the mesh's graph never catching up.

modules/gitea/client.ts

@@ -229,6 +229,17 @@ export class GiteaClient {
     return GiteaClient.mapPull(await this.request<any>(`/repos/${owner}/${repo}/pulls/${index}`));
   }
 
+  /** The files a merged pull request changed, as paths from the repository's root.
+   *
+   *  `limit` is what is asked for, and a merge that changed more says so rather than being read
+   *  page by page: what the mesh does with a partial list is treat the whole repository as changed,
+   *  so more pages would buy nothing. */
+  async listPullFiles(owner: string, repo: string, index: number, limit = 100): Promise<{ paths: string[]; truncated: boolean }> {
+    const files = await this.request<any[]>(`/repos/${owner}/${repo}/pulls/${index}/files?limit=${limit}`);
+    const paths = (files ?? []).map((f) => String(f?.filename ?? "")).filter((p) => p !== "");
+    return { paths, truncated: paths.length >= limit };
+  }
+
   async createPullRequest(
     owner: string,
     repo: string,

modules/gitea/index.ts

@@ -61,9 +61,17 @@ import { join } from "node:path";
 const mergedRecord = process.env.MESH_GITEA_STATE_DIR ? join(process.env.MESH_GITEA_STATE_DIR, "merged-announced.json") : null;
 const announced = new Set<string>();
 let primedMerges = false;
+// since is the moment the watching began: a merge made before it is history, whatever page of the
+// forge's listing it surfaces on. Without it, an old merge past the first page — pushed into view
+// as newer pull requests were updated — was announced as if it had just happened, and the mesh
+// rebuilt everything built from that repository, once per old merge (2026-09-28).
+let since = "";
 if (mergedRecord && existsSync(mergedRecord)) {
   try {
-    for (const sha of JSON.parse(readFileSync(mergedRecord, "utf8")) as string[]) announced.add(sha);
+    const kept = JSON.parse(readFileSync(mergedRecord, "utf8")) as string[] | { announced: string[]; since: string };
+    const list = Array.isArray(kept) ? kept : kept.announced;
+    for (const sha of list) announced.add(sha);
+    since = Array.isArray(kept) ? new Date().toISOString() : kept.since;
     primedMerges = true;
   } catch {
     // An unreadable record is treated as no record: prime again rather than re-announce history.
@@ -73,7 +81,7 @@ function keepAnnounced(): void {
   if (!mergedRecord) return;
   mkdirSync(join(mergedRecord, ".."), { recursive: true });
   const tmp = mergedRecord + ".tmp";
-  writeFileSync(tmp, JSON.stringify([...announced].slice(-2000)));
+  writeFileSync(tmp, JSON.stringify({ announced: [...announced].slice(-2000), since }));
   renameSync(tmp, mergedRecord);
 }
 async function pollMerged(client: GiteaClient): Promise<void> {
@@ -83,7 +91,14 @@ async function pollMerged(client: GiteaClient): Promise<void> {
     const pulls = await client.listPullRequests(repo.owner, repo.name, { state: "closed", sort: "recentupdate", limit: "20" });
     for (const pull of pulls) {
       if (!pull.merged || !pull.merge_commit_sha || announced.has(pull.merge_commit_sha)) continue;
-      if (primedMerges) {
+      // Announced only if merged since the watching began; recorded either way, so it is looked
+      // at once.
+      const fresh = !!pull.merged_at && !!since && pull.merged_at > since;
+      if (primedMerges && fresh) {
+        // What it changed, asked for only now: a module is rebuilt because a file inside its own
+        // directory moved, and without this every module built from a repository is rebuilt for a
+        // change to any of them (novox/hq 04-ISSUES/131).
+        const changed = await client.listPullFiles(repo.owner, repo.name, pull.number);
         await emit("pull.merged", {
           owner: repo.owner,
           repo: repo.name,
@@ -95,12 +110,18 @@ async function pollMerged(client: GiteaClient): Promise<void> {
           merged_at: pull.merged_at,
           clone_url: repo.clone_url,
           html_url: pull.html_url,
+          paths: changed.paths,
+          paths_truncated: changed.truncated,
         });
+        // Said, because a trigger that fires silently is indistinguishable from one that did not
+        // fire (novox/hq 04-ISSUES/131) — this line is how an operator knows the mesh was told.
+        console.log(`[gitea] announced merge ${repo.full_name}#${pull.number} (${pull.merge_commit_sha.slice(0, 8)}) into ${pull.base}`);
       }
       announced.add(pull.merge_commit_sha);
       changed = true;
     }
   }
+  if (!primedMerges) since = new Date().toISOString();
   if (!primedMerges || changed) keepAnnounced();
   primedMerges = true;
 }

modules/gitea/tools/index.ts

@@ -233,6 +233,9 @@ export function getGiteaTools(gitea: GiteaClient): ToolDefinition[] {
         await gitea.mergePullRequest(owner, repo, number, method, deleteBranch);
         // Read it again: the merge commit only exists now, and it is what a build is made from.
         const merged = await gitea.getPullRequest(owner, repo, number);
+        // And what it changed, so the mesh rebuilds the modules whose own files moved rather than
+        // every module built from the repository (novox/hq 04-ISSUES/131).
+        const changed = await gitea.listPullFiles(owner, repo, number);
         await emit("pull.merged", {
           owner,
           repo,
@@ -244,6 +247,8 @@ export function getGiteaTools(gitea: GiteaClient): ToolDefinition[] {
           merged_at: merged.merged_at,
           method,
           html_url: pull.html_url,
+          paths: changed.paths,
+          paths_truncated: changed.truncated,
         });
         return { merged: true, number, method, deleted_branch: deleteBranch };
       },

modules/mesh-catalog/module.json

@@ -34,7 +34,8 @@
   "emits": [
     "registered",
     "upgraded",
-    "rebuild-needed"
+    "rebuild-needed",
+    "catching-up"
   ],
   "resources": [
     {