CI: push to ipcr-push-85-17-246-67.ip.nsl.sh (the box's cert no longer covers nip.io) [skip ci]

.gitea/workflows/docker.yml

@@ -0,0 +1,85 @@
+# Gitea twin of .github/workflows/docker.yml. Gitea runs only .gitea/workflows/ once this
+# folder exists, and GitHub never reads it.
+#
+# Publishes to IPCR on watch.nsl.sh instead of ghcr.io:
+#   push  ipcr-push-85-17-246-67.ip.nsl.sh/metadec.eth/<repo>:<tag>   docker login as metadec.eth with the
+#         IPCR_PUSH_TOKEN secret (the metadec.eth namespace token from the IPCR dashboard)
+#   pull  ipcr-watch.nsl.sh/ipns/metadec.eth/metadec.eth/<repo>:<tag>   anonymous
+# The push goes to ipcr-push-85-17-246-67.ip.nsl.sh, the box's own address, not ipcr-push-watch.nsl.sh: Cloudflare fronts
+# *.watch.nsl.sh and refuses any request over 100 MB (413), which a large image layer is.
+# That host's certificate is signed by the box's private Mesh Router CA, given to buildkit from
+# the IPCR_CA_PEM repo variable. docker login would make the job's Docker daemon check the
+# certificate without that CA, so the login is written straight into ~/.docker/config.json.
+# The runner's job image (node:22-bookworm) has no docker CLI, so the static one is
+# installed first; buildx installs itself. No `type=gha` cache: the runner has none.
+
+name: Build and Push Docker Image
+
+on:
+  push:
+    branches: [main, master]
+    tags: ['v*']
+  pull_request:
+    branches: [main, master]
+
+env:
+  REGISTRY: ipcr-push-85-17-246-67.ip.nsl.sh
+  IMAGE_NAME: metadec.eth/${{ github.event.repository.name }}
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Install Docker CLI
+        run: curl -fsSL https://download.docker.com/linux/static/stable/x86_64/docker-28.5.1.tgz | tar -xz -C /usr/local/bin --strip-components=1 docker/docker
+
+      - name: Trust the Mesh Router CA
+        run: printf '%s\n' "$IPCR_CA_PEM" > /tmp/ipcr-ca.pem
+        env:
+          IPCR_CA_PEM: ${{ vars.IPCR_CA_PEM }}
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+        with:
+          version: latest
+          buildkitd-config-inline: |
+            [registry."${{ env.REGISTRY }}"]
+              ca = ["/tmp/ipcr-ca.pem"]
+
+      - name: Log in to IPCR
+        if: github.event_name != 'pull_request'
+        env:
+          IPCR_PUSH_TOKEN: ${{ secrets.IPCR_PUSH_TOKEN }}
+        run: |
+          mkdir -p ~/.docker
+          printf '{"auths":{"%s":{"auth":"%s"}}}\n' "$REGISTRY" "$(printf 'metadec.eth:%s' "$IPCR_PUSH_TOKEN" | base64 -w0)" > ~/.docker/config.json
+
+      - name: Extract metadata
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          tags: |
+            type=ref,event=branch
+            type=ref,event=pr
+            type=semver,pattern={{version}}
+            # A fix to release 1.2.3 is tagged v1.2.3.1: four numbers are not semver, so
+            # the pattern above makes no tag for it; this one does (image tag 1.2.3.1).
+            type=match,pattern=v(\d+\.\d+\.\d+\.\d+),group=1
+            type=semver,pattern={{major}}.{{minor}}
+            type=sha
+
+      - name: Build and push
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}

.github/workflows/docker.yml

@@ -42,6 +42,9 @@ jobs:
             type=ref,event=branch
             type=ref,event=pr
             type=semver,pattern={{version}}
+            # A fix to release 1.2.3 is tagged v1.2.3.1: four numbers are not semver, so
+            # the pattern above makes no tag for it; this one does (image tag 1.2.3.1).
+            type=match,pattern=v(\d+\.\d+\.\d+\.\d+),group=1
             type=semver,pattern={{major}}.{{minor}}
             type=sha
 

src/beacon-advertise.ts

@@ -0,0 +1,188 @@
+/**
+ * Beacon v2 advertiser — makes this plugin findable by meta-sort's Plugins
+ * page (Scan → Add) without anyone typing its URL.
+ *
+ * Advertises one resource, cap `metamesh.enrich/<manifest id>`, on the beacon
+ * group (239.255.99.1:9099): unsolicited every 10 s, and unicast in reply to
+ * any probe whose `want` matches. Says `bye` on shutdown. It keeps no view of
+ * other nodes — a plugin only needs to be found. Spec:
+ * meta-root docs/project-architecture/beacon-v2.md.
+ *
+ * Env:
+ *   ENABLE_UDP_DISCOVERY  false/0/no/off disables
+ *   BEACON_ADVERTISE_URL  endpoints.http (default http://$HOSTNAME:$PORT)
+ *   BEACON_BINDS          the one meta-sort instance allowed to list it
+ *                         (meta-sort sets this on containers it spawns)
+ *   BEACON_GROUP / BEACON_PORT / BEACON_INTERVAL_MS
+ *
+ * ⚠ MIRRORED FILE. Byte-identical copies live in every TypeScript
+ * metamesh-plugin-*; see meta-root `scripts/check-mirrors.sh`. Never fatal: a
+ * host that blocks multicast logs a warning and the plugin serves on.
+ */
+
+import dgram from 'dgram';
+import { hostname, networkInterfaces } from 'os';
+
+const PROTO = 'beacon';
+const VERSION = 2;
+
+interface Resource {
+    id: string;
+    caps: string[];
+    endpoints: Record<string, string>;
+    binds?: string;
+}
+
+interface NodeInfo {
+    name: string;
+    instance: string;
+    version?: string;
+}
+
+function envNum(key: string): number | undefined {
+    const n = Number(process.env[key]);
+    return Number.isFinite(n) && n > 0 ? n : undefined;
+}
+
+function enabled(): boolean {
+    const v = (process.env.ENABLE_UDP_DISCOVERY ?? '').trim().toLowerCase();
+    return !['false', '0', 'no', 'off'].includes(v);
+}
+
+/** IPv4 addresses of every up, non-internal interface. */
+function interfaceAddresses(): string[] {
+    const out: string[] = [];
+    for (const list of Object.values(networkInterfaces())) {
+        for (const ni of list ?? []) {
+            const v4 = (ni as { family: string | number }).family === 'IPv4' || (ni as { family: string | number }).family === 4;
+            if (v4 && !ni.internal && ni.address) out.push(ni.address);
+        }
+    }
+    return out;
+}
+
+/** Same matching rules as the spec: `*`, `x/*`, optional `@contract`. */
+function capMatches(pattern: string, cap: string): boolean {
+    if (pattern === '*') return true;
+    const split = (s: string): [string, string | null] => {
+        const i = s.lastIndexOf('@');
+        return i >= 0 ? [s.slice(0, i), s.slice(i + 1)] : [s, null];
+    };
+    const [pb, pc] = split(pattern);
+    const [cb, cc] = split(cap);
+    if (pc !== null && cc !== pc) return false;
+    if (pb.endsWith('/*')) {
+        const prefix = pb.slice(0, -2);
+        const rest = cb.startsWith(prefix) ? cb.slice(prefix.length) : '';
+        return rest.startsWith('/') && rest.length > 1;
+    }
+    return pb === cb;
+}
+
+let socket: dgram.Socket | null = null;
+let timer: NodeJS.Timeout | null = null;
+let node: NodeInfo | null = null;
+let resource: Resource | null = null;
+let ifaces: string[] = [];
+let group = '239.255.99.1';
+let udpPort = 9099;
+
+function send(msg: object, dest?: { address: string; port: number }): void {
+    const s = socket;
+    if (!s) return;
+    const body = Buffer.from(JSON.stringify(msg));
+    if (dest) {
+        s.send(body, dest.port, dest.address, () => {});
+        return;
+    }
+    // Once per interface: the default route alone reaches one network.
+    for (const addr of ifaces) {
+        try {
+            s.setMulticastInterface(addr);
+            s.send(body, udpPort, group, () => {});
+        } catch (e) {
+            console.warn(`[beacon] send on ${addr} failed:`, e);
+        }
+    }
+}
+
+function advertise(dest?: { address: string; port: number }): void {
+    if (!node || !resource) return;
+    send({ proto: PROTO, v: VERSION, type: 'advertise', node, resources: [resource] }, dest);
+}
+
+/**
+ * Start advertising this plugin. Call once the HTTP server is listening, so a
+ * consumer that hears it can reach it. Idempotent.
+ */
+export function startBeacon(pluginId: string, version: string, httpPort: number): void {
+    if (socket || !enabled()) return;
+    group = process.env.BEACON_GROUP || group;
+    udpPort = envNum('BEACON_PORT') ?? udpPort;
+    const intervalMs = envNum('BEACON_INTERVAL_MS') ?? 10_000;
+    const instance = process.env.HOSTNAME || hostname();
+    const url = (process.env.BEACON_ADVERTISE_URL || `http://${instance}:${httpPort}`).replace(/\/+$/, '');
+    const binds = (process.env.BEACON_BINDS || '').trim();
+
+    node = { name: `metamesh-plugin-${pluginId}`, instance, ...(version ? { version } : {}) };
+    resource = {
+        id: pluginId,
+        caps: [`metamesh.enrich/${pluginId}`],
+        endpoints: { http: url, manifest: '/manifest' },
+        ...(binds ? { binds } : {}),
+    };
+
+    const s = dgram.createSocket({ type: 'udp4', reuseAddr: true });
+    socket = s;
+    s.on('error', (err) => console.warn('[beacon] socket error:', err.message));
+    s.on('message', (buf, rinfo) => {
+        let m: { proto?: string; v?: number; type?: string; from?: string; want?: string[] };
+        try {
+            m = JSON.parse(buf.toString('utf8'));
+        } catch {
+            return; // foreign traffic on the shared group
+        }
+        if (m?.proto !== PROTO || m.v !== VERSION || m.type !== 'probe' || m.from === instance) return;
+        const want = Array.isArray(m.want) ? m.want : [];
+        if (want.length === 0 || resource!.caps.some((c) => want.some((p) => capMatches(p, c)))) {
+            advertise({ address: rinfo.address, port: rinfo.port });
+        }
+    });
+    s.bind(udpPort, '0.0.0.0', () => {
+        try {
+            s.setMulticastTTL(1);
+        } catch {
+            /* best effort */
+        }
+        ifaces = interfaceAddresses();
+        for (const addr of ifaces) {
+            try {
+                s.addMembership(group, addr);
+            } catch (e) {
+                console.warn(`[beacon] join ${group} on ${addr} failed:`, e);
+            }
+        }
+        console.log(`[beacon] advertising metamesh.enrich/${pluginId} at ${url} on ${group}:${udpPort}`);
+        advertise();
+        timer = setInterval(() => advertise(), intervalMs);
+        timer.unref?.();
+    });
+}
+
+/** Say `bye` so consumers drop this plugin at once. */
+export async function stopBeacon(): Promise<void> {
+    if (!socket || !node) return;
+    if (timer) clearInterval(timer);
+    send({ proto: PROTO, v: VERSION, type: 'bye', node });
+    // Let the bye datagrams leave before the socket closes under them.
+    await new Promise((r) => setTimeout(r, 50));
+    const s = socket;
+    socket = null;
+    await new Promise<void>((resolve) => {
+        try {
+            s.close(() => resolve());
+        } catch {
+            resolve();
+        }
+    });
+}

src/index.ts

@@ -33,7 +33,8 @@ import type {
     ConfigureRequest,
     ConfigureResponse,
 } from './types.js';
-import { manifest, process as processFile } from './plugin.js';
+import { manifest, process as processFile, configure } from './plugin.js';
+import { startBeacon, stopBeacon } from './beacon-advertise.js';
 
 const app = Fastify({ logger: true });
 let ready = false;
@@ -53,6 +54,7 @@ app.get('/manifest', async () => manifest);
 app.post<{ Body: ConfigureRequest }>('/configure', async (request): Promise<ConfigureResponse> => {
     try {
         pluginConfig = request.body.config || {};
+        configure(pluginConfig);
         console.log('[file-info] Configuration updated');
         return { status: 'ok' };
     } catch (error) {
@@ -90,12 +92,14 @@ const port = parseInt(process.env.PORT || '8080', 10);
 const host = process.env.HOST || '0.0.0.0';
 
 app.listen({ port, host }).then(() => {
+    startBeacon(manifest.id, manifest.version, port);
     ready = true;
     console.log(`[file-info] Plugin listening on http://${host}:${port}`);
 });
 
 // Graceful shutdown
 process.on('SIGTERM', async () => {
+    await stopBeacon();
     ready = false;
     await app.close();
     process.exit(0);

src/meta-core-client.ts

@@ -1,65 +1,380 @@
 /**
- * meta-core API Client for writing metadata
- * Fails gracefully if meta-core is unavailable (returns without throwing)
+ * meta-core client: signed claim writes (MMUR2) + plain reads.
+ *
+ * MIRRORED byte-for-byte across every `metamesh-plugin-*` TypeScript plugin and
+ * meta-sort-core (`src/kv/meta-core-client.ts`) — guarded by
+ * `scripts/check-mirrors.sh`. Edit one copy, then copy it everywhere.
+ *
+ * Every write is a vote signed by THIS container's key
+ * (docs/implementation/metacore-claims-model.md §3, §9):
+ *
+ *   bytes_to_sign = "MMUR2\n" || canonical CBOR [cid, uid, key, value, ts]
+ *   sig           = ECDSA-secp256k1(SHA-256(bytes)), compact r||s, low-S
+ *
+ * and is posted to `POST {baseUrl}/api/claims` — meta-core directly, or
+ * meta-sort's pass-through relay when the plugin runs under meta-sort. The
+ * encoding is pinned by meta-core's `internal/claim/testdata/claim-vectors.json`
+ * (vendored as `test/claim-vectors.json`).
+ *
+ * Key: `METAMESH_SIGNING_KEY` (64 hex chars) or `METAMESH_SIGNING_KEY_FILE`
+ * (read; generated and written 0600 if missing). With neither, writes are
+ * refused (logged, return false) — no silent throwaway identities.
+ *
+ * Fails gracefully if meta-core is unavailable: logs and returns, never throws.
  */
 
+import * as crypto from 'crypto';
+import * as fs from 'fs';
+import * as path from 'path';
+
+// ---------------------------------------------------------------- encoding --
+
+const DOMAIN = Buffer.from('MMUR2\n', 'utf8');
+const B58 = '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz';
+const N = BigInt('0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141');
+const HALF_N = N >> 1n;
+
+/** A claim value: text (public), bytes (private envelope) or null (retraction). */
+export type ClaimValue = string | Uint8Array | null;
+
+export interface SignedClaim {
+    cid: string;
+    uid: string;
+    key: string;
+    value: ClaimValue;
+    ts: number;
+    sig: Uint8Array;
+}
+
+function head(major: number, n: number | bigint): Buffer {
+    const m = major << 5;
+    const v = BigInt(n);
+    if (v < 24n) return Buffer.from([m | Number(v)]);
+    if (v <= 0xffn) return Buffer.from([m | 24, Number(v)]);
+    if (v <= 0xffffn) {
+        const b = Buffer.alloc(3);
+        b[0] = m | 25;
+        b.writeUInt16BE(Number(v), 1);
+        return b;
+    }
+    if (v <= 0xffffffffn) {
+        const b = Buffer.alloc(5);
+        b[0] = m | 26;
+        b.writeUInt32BE(Number(v), 1);
+        return b;
+    }
+    const b = Buffer.alloc(9);
+    b[0] = m | 27;
+    b.writeBigUInt64BE(v, 1);
+    return b;
+}
+
+function text(s: string): Buffer {
+    const raw = Buffer.from(s, 'utf8');
+    return Buffer.concat([head(3, raw.length), raw]);
+}
+
+/** The exact bytes an MMUR2 signature covers. */
+export function signedBytes(cid: string, uid: string, key: string, value: ClaimValue, ts: number): Buffer {
+    let v: Buffer;
+    if (value === null) v = Buffer.from([0xf6]);
+    else if (typeof value === 'string') v = text(value);
+    else v = Buffer.concat([head(2, value.length), Buffer.from(value)]);
+    return Buffer.concat([DOMAIN, head(4, 5), text(cid), text(uid), text(key), v, head(0, ts)]);
+}
+
+function base58Encode(bytes: Uint8Array): string {
+    let n = BigInt('0x' + (Buffer.from(bytes).toString('hex') || '0'));
+    let out = '';
+    while (n > 0n) {
+        out = B58[Number(n % 58n)] + out;
+        n /= 58n;
+    }
+    for (const b of bytes) {
+        if (b !== 0) break;
+        out = '1' + out;
+    }
+    return out;
+}
+
+function base58Decode(s: string): Buffer {
+    let n = 0n;
+    for (const ch of s) {
+        const i = B58.indexOf(ch);
+        if (i < 0) throw new Error(`invalid base58 character ${ch}`);
+        n = n * 58n + BigInt(i);
+    }
+    let hex = n === 0n ? '' : n.toString(16);
+    if (hex.length % 2) hex = '0' + hex;
+    let zeros = 0;
+    while (zeros < s.length && s[zeros] === '1') zeros++;
+    return Buffer.concat([Buffer.alloc(zeros), Buffer.from(hex, 'hex')]);
+}
+
+function b64url(b: Buffer): string {
+    return b.toString('base64url');
+}
+
+function publicKeyFromCompressed(compressed: Buffer): crypto.KeyObject {
+    const full = crypto.ECDH.convertKey(compressed, 'secp256k1', undefined, undefined, 'uncompressed') as Buffer;
+    return crypto.createPublicKey({
+        key: { kty: 'EC', crv: 'secp256k1', x: b64url(full.subarray(1, 33)), y: b64url(full.subarray(33, 65)) },
+        format: 'jwk',
+    });
+}
+
+/** Rewrite a compact signature to its low-S form (MMUR2 refuses high-S). */
+function lowS(sig: Buffer): Buffer {
+    const s = BigInt('0x' + sig.subarray(32).toString('hex'));
+    if (s <= HALF_N) return sig;
+    const fixed = Buffer.from((N - s).toString(16).padStart(64, '0'), 'hex');
+    return Buffer.concat([sig.subarray(0, 32), fixed]);
+}
+
+/** True when the claim's signature is a valid low-S signature by its uid. */
+export function verifyClaim(c: SignedClaim): boolean {
+    try {
+        const sig = Buffer.from(c.sig);
+        if (sig.length !== 64) return false;
+        if (BigInt('0x' + sig.subarray(32).toString('hex')) > HALF_N) return false;
+        if (!c.uid.startsWith('z')) return false;
+        const pub = base58Decode(c.uid.slice(1));
+        if (pub.length !== 33) return false;
+        return crypto.verify(
+            'sha256',
+            signedBytes(c.cid, c.uid, c.key, c.value, c.ts),
+            { key: publicKeyFromCompressed(pub), dsaEncoding: 'ieee-p1363' },
+            sig,
+        );
+    } catch {
+        return false;
+    }
+}
+
+// ----------------------------------------------------------------- signer --
+
+export class ClaimSigner {
+    readonly uid: string;
+    private readonly key: crypto.KeyObject;
+    private lastTs = 0;
+
+    constructor(privateKeyHex: string) {
+        const hex = privateKeyHex.trim().replace(/^0x/i, '');
+        if (!/^[0-9a-fA-F]{64}$/.test(hex)) throw new Error('signing key must be 64 hex characters');
+        const d = Buffer.from(hex, 'hex');
+        const ecdh = crypto.createECDH('secp256k1');
+        ecdh.setPrivateKey(d);
+        const full = ecdh.getPublicKey(null, 'uncompressed');
+        this.uid = 'z' + base58Encode(ecdh.getPublicKey(null, 'compressed'));
+        this.key = crypto.createPrivateKey({
+            key: {
+                kty: 'EC', crv: 'secp256k1', d: b64url(d),
+                x: b64url(full.subarray(1, 33)), y: b64url(full.subarray(33, 65)),
+            },
+            format: 'jwk',
+        });
+    }
+
+    /** Milliseconds, strictly increasing within this process (ts is the version). */
+    nextTs(): number {
+        this.lastTs = Math.max(Date.now(), this.lastTs + 1);
+        return this.lastTs;
+    }
+
+    sign(cid: string, key: string, value: ClaimValue, ts: number = this.nextTs()): SignedClaim {
+        const raw = crypto.sign('sha256', signedBytes(cid, this.uid, key, value, ts), {
+            key: this.key,
+            dsaEncoding: 'ieee-p1363',
+        });
+        return { cid, uid: this.uid, key, value, ts, sig: lowS(raw) };
+    }
+}
+
+let cachedSigner: ClaimSigner | null | undefined;
+
+/**
+ * The process signer from the environment, or null when no key is configured.
+ * Read lazily on first write; `resetSignerForTests()` forgets it.
+ */
+export function loadSigner(): ClaimSigner | null {
+    if (cachedSigner !== undefined) return cachedSigner;
+    const inline = process.env.METAMESH_SIGNING_KEY;
+    const file = process.env.METAMESH_SIGNING_KEY_FILE;
+    try {
+        if (inline) {
+            cachedSigner = new ClaimSigner(inline);
+        } else if (file) {
+            if (!fs.existsSync(file)) {
+                fs.mkdirSync(path.dirname(file), { recursive: true });
+                fs.writeFileSync(file, crypto.randomBytes(32).toString('hex') + '\n', { mode: 0o600 });
+            }
+            cachedSigner = new ClaimSigner(fs.readFileSync(file, 'utf8'));
+        } else {
+            cachedSigner = null;
+        }
+    } catch (error) {
+        console.warn(`[MetaCoreClient] Signing key unusable: ${error instanceof Error ? error.message : String(error)}`);
+        cachedSigner = null;
+    }
+    if (cachedSigner) console.log(`[MetaCoreClient] Signing claims as ${cachedSigner.uid}`);
+    else console.warn('[MetaCoreClient] No METAMESH_SIGNING_KEY / METAMESH_SIGNING_KEY_FILE — metadata writes are refused');
+    return cachedSigner;
+}
+
+export function resetSignerForTests(): void {
+    cachedSigner = undefined;
+}
+
+/** The §3.4 JSON form. */
+export function claimToJSON(c: SignedClaim): Record<string, unknown> {
+    let value: unknown = null;
+    if (typeof c.value === 'string') value = c.value;
+    else if (c.value) value = { b64: Buffer.from(c.value).toString('base64') };
+    return { cid: c.cid, uid: c.uid, key: c.key, value, ts: c.ts, sig: Buffer.from(c.sig).toString('base64') };
+}
+
+// ----------------------------------------------------------------- client --
+
 export class MetaCoreClient {
     constructor(private baseUrl: string) {}
 
     private async safeFetch(url: string, options: RequestInit): Promise<Response | null> {
         try {
-            return await fetch(url, { ...options, signal: AbortSignal.timeout(5000) });
-        } catch {
-            // meta-core unavailable - fail silently (expected in standalone/test mode)
+            return await fetch(url, { ...options, signal: AbortSignal.timeout(10000) });
+        } catch (error) {
+            console.warn(`[MetaCoreClient] Warning: meta-core unavailable at ${this.baseUrl}: ${error instanceof Error ? error.message : String(error)}`);
             return null;
         }
     }
 
-    async setProperty(hashId: string, key: string, value: string): Promise<void> {
-        const response = await this.safeFetch(`${this.baseUrl}/meta/${hashId}/${key}`, {
-            method: 'PUT',
+    /**
+     * Sign and post claims about `cid`. True when every claim was accepted (or
+     * was already stored: `unchanged` / `stale` are not failures).
+     */
+    async writeClaims(cid: string, values: Array<[string, ClaimValue]>): Promise<boolean> {
+        if (values.length === 0) return true;
+        const signer = loadSigner();
+        if (!signer) return false;
+        const claims = values.map(([key, value]) => claimToJSON(signer.sign(cid, key, value)));
+        const response = await this.safeFetch(`${this.baseUrl}/api/claims`, {
+            method: 'POST',
             headers: { 'Content-Type': 'application/json' },
-            body: JSON.stringify({ value }),
+            body: JSON.stringify(claims),
         });
-        // Silently ignore errors (expected in standalone/test mode)
+        if (!response) return false;
+        if (!response.ok) {
+            console.warn(`[MetaCoreClient] Claims for ${cid} rejected: ${response.status}`);
+            return false;
+        }
+        const statuses = await response.json().catch(() => null) as Array<{ status?: string; reason?: string }> | null;
+        const bad = (statuses ?? []).filter((s) => s.status === 'bad_signature' || s.status === 'bad_request');
+        if (bad.length > 0) {
+            console.warn(`[MetaCoreClient] ${bad.length} claim(s) for ${cid} refused: ${bad[0].status} ${bad[0].reason ?? ''}`);
+            return false;
+        }
+        return true;
+    }
+
+    /** One text claim. */
+    async setProperty(hashId: string, key: string, value: string): Promise<boolean> {
+        return this.writeClaims(hashId, [[key, String(value)]]);
+    }
+
+    /** One text claim per entry, in a single batch. */
+    async mergeMetadata(hashId: string, metadata: Record<string, string>): Promise<boolean> {
+        return this.writeClaims(hashId, Object.entries(metadata).map(([k, v]) => [k, String(v)]));
+    }
+
+    /**
+     * Retract this signer's own vote for `key`. Other signers' votes for the
+     * same key are untouched (there are no negative votes).
+     */
+    async deleteProperty(hashId: string, key: string): Promise<boolean> {
+        return this.writeClaims(hashId, [[key, null]]);
+    }
+
+    /**
+     * Append a member to a legacy csv-set field (`genres`, `studio`, `tags`,
+     * `announceList`, …) — the comma-joined shape readers still parse (the
+     * METADATA_KEYS §14.12 key-set migration is out of scope for phase 1).
+     *
+     * Under claims a signer owns only its OWN vote, so this reads this
+     * signer's current claim for (cid, key) from
+     * `GET /api/meta/{cid}/claims?key=<key>` (other signers' claims are
+     * ignored), adds the member if absent and signs the new full value as one
+     * text claim. Members are kept raw (no escaping), same as the old
+     * meta-sort `_add` proxy. A member already present writes nothing.
+     */
+    async addToSet(hashId: string, key: string, value: string): Promise<boolean> {
+        const member = String(value);
+        if (!member) return true;
+        const signer = loadSigner();
+        if (!signer) return false;
+        const current = await this.ownClaimValue(hashId, key, signer.uid);
+        if (current === undefined) return false; // could not read: never clobber our own set
+        const members = current ? current.split(',').map((v) => v.trim()).filter(Boolean) : [];
+        if (members.includes(member)) return true;
+        return this.writeClaims(hashId, [[key, [...members, member].join(',')]]);
+    }
+
+    /**
+     * This signer's newest text claim for (cid, key): the value, `null` when it
+     * has none, `undefined` when the claims could not be read.
+     */
+    private async ownClaimValue(cid: string, key: string, uid: string): Promise<string | null | undefined> {
+        const url = `${this.baseUrl}/api/meta/${encodeURIComponent(cid)}/claims?key=${encodeURIComponent(key)}`;
+        const response = await this.safeFetch(url, { method: 'GET' });
+        if (!response) return undefined;
+        if (response.status === 404) return null;
+        if (!response.ok) {
+            console.warn(`[MetaCoreClient] Failed to read claims for ${cid}/${key}: ${response.status}`);
+            return undefined;
+        }
+        const body = await response.json().catch(() => null) as unknown;
+        const list = (Array.isArray(body) ? body : (body as { claims?: unknown })?.claims) as
+            Array<{ uid?: string; key?: string; value?: unknown; ts?: number }> | undefined;
+        let best: { value: string; ts: number } | null = null;
+        for (const c of Array.isArray(list) ? list : []) {
+            if (c.uid !== uid || c.key !== key || typeof c.value !== 'string') continue;
+            const ts = Number(c.ts) || 0;
+            if (!best || ts > best.ts) best = { value: c.value, ts };
+        }
+        return best ? best.value : null;
     }
 
     async getProperty(hashId: string, key: string): Promise<string | null> {
         const response = await this.safeFetch(`${this.baseUrl}/meta/${hashId}/${key}`, { method: 'GET' });
-        if (!response || response.status === 404) return null;
-        if (!response.ok) return null;
-        const data = await response.json() as { value?: string };
-        return data.value ?? null;
+        if (!response || !response.ok) return null;
+        const data = await response.json() as { value?: unknown };
+        return data.value === undefined || data.value === null ? null : String(data.value);
     }
 
-    async mergeMetadata(hashId: string, metadata: Record<string, string>): Promise<void> {
-        const response = await this.safeFetch(`${this.baseUrl}/meta/${hashId}`, {
-            method: 'PATCH',
-            headers: { 'Content-Type': 'application/json' },
-            body: JSON.stringify(metadata),
-        });
-        // Silently ignore errors (expected in standalone/test mode)
-    }
-
-    async deleteProperty(hashId: string, key: string): Promise<void> {
-        const response = await this.safeFetch(`${this.baseUrl}/meta/${hashId}/${key}`, { method: 'DELETE' });
-        // Silently ignore errors (expected in standalone/test mode)
-    }
-
-    async addToSet(hashId: string, key: string, value: string): Promise<void> {
-        const response = await this.safeFetch(`${this.baseUrl}/meta/${hashId}/_add/${key}`, {
-            method: 'POST',
-            headers: { 'Content-Type': 'application/json' },
-            body: JSON.stringify({ value }),
-        });
-        // Silently ignore errors (expected in standalone/test mode)
-    }
-
-    async getMetadata(hashId: string): Promise<Record<string, string>> {
+    /**
+     * Whole merged record, in whatever form the endpoint serves (meta-sort's
+     * /meta is nested, meta-core's is flat) — callers flatten. `null` when the
+     * call itself failed, `{}` when the record does not exist.
+     */
+    async getMetadata(hashId: string): Promise<Record<string, unknown> | null> {
         const response = await this.safeFetch(`${this.baseUrl}/meta/${hashId}`, { method: 'GET' });
-        if (!response || response.status === 404) return {};
-        if (!response.ok) return {};
-        const data = await response.json() as { metadata?: Record<string, string> };
+        if (!response) return null;
+        if (response.status === 404) return {};
+        if (!response.ok) return null;
+        const data = await response.json() as { metadata?: Record<string, unknown> };
         return data.metadata ?? {};
     }
+
+    /**
+     * Compute the CID of a file under FILES_PATH via meta-core's `POST /file/cid`.
+     * @param filePath - path relative to FILES_PATH (e.g. "poster/Movie (2024)_poster.jpg")
+     */
+    async computeFileCID(filePath: string): Promise<string | null> {
+        const response = await this.safeFetch(`${this.baseUrl}/file/cid`, {
+            method: 'POST',
+            headers: { 'Content-Type': 'application/json' },
+            body: JSON.stringify({ path: filePath }),
+        });
+        if (!response || !response.ok) return null;
+        const data = await response.json().catch(() => null) as { cid?: string } | null;
+        return data?.cid ?? null;
+    }
 }

src/plugin.ts

@@ -105,9 +105,57 @@ export const manifest: PluginManifest = {
             readonly: true,
         },
     },
-    config: {},
+    config: {
+        forceRecompute: { type: 'boolean', label: 'Force Recompute', default: false },
+    },
 };
 
+/** Overwrite `fileName` even when another writer already set one. Default off. */
+let forceRecompute = false;
+
+export function configure(config: Record<string, unknown>): void {
+    forceRecompute = config.forceRecompute === true;
+    console.log(`[file-info] Config: forceRecompute=${forceRecompute}`);
+}
+
+/**
+ * Whether we may write `fileName` on this record.
+ *
+ * `fileName` has **two writers** (METADATA_KEYS.md §`fileName`): this plugin,
+ * which knows the on-disk basename, and the indexer feeders, which emit the raw
+ * release string at ingest. They meet on one record whenever meta-share
+ * materialises a search hit into a tree meta-core watches — the bytes' midhash
+ * is the record's content CID, so this plugin lands on the record the feeder
+ * already wrote.
+ *
+ * A Usenet posting's on-disk name is the poster's, and posters obfuscate it
+ * (`9765de45fa2d4522a80d01363d3c0919.mkv`). Writing it unconditionally destroyed
+ * the only readable name the record had, in a last-writer-wins race that showed
+ * up as hex on meta-watch's source rows.
+ *
+ * Precedence, mirroring the `still` rule the registry already legislates: the
+ * writer that knows less yields, and it yields by skipping a record that already
+ * carries a value. We know less — a basename is a container's filing detail,
+ * a release string is the release's identity.
+ *
+ * The record is re-read over the network rather than trusted from
+ * `existingMeta`: that map is delivered nested for grouped keys, and it is
+ * snapshotted before dispatch. `existingMeta` is the fallback for standalone /
+ * test mode, where `getProperty` cannot reach meta-core and answers `null`.
+ */
+async function mayWriteFileName(
+    metaCore: MetaCoreClient,
+    request: ProcessRequest,
+    cid: string,
+    fileName: string
+): Promise<boolean> {
+    if (forceRecompute) return true;
+    const existing = (await metaCore.getProperty(cid, 'fileName')) ?? request.existingMeta?.fileName ?? null;
+    if (!existing || existing === fileName) return true;
+    console.log(`[file-info] Keeping existing fileName "${existing}" (not overwriting with "${fileName}")`);
+    return false;
+}
+
 export async function process(
     request: ProcessRequest,
     sendCallback: (payload: CallbackPayload) => Promise<void>
@@ -165,7 +213,12 @@ export async function process(
             await metaCore.setProperty(cid, 'mimeType', mimeType);
         }
         await metaCore.setProperty(cid, 'sizeByte', String(fileSize));
+        if (await mayWriteFileName(metaCore, request, cid, fileName)) {
             await metaCore.setProperty(cid, 'fileName', fileName);
+        }
+        // `extension` is unguarded on purpose: METADATA_KEYS.md names exactly one
+        // writer for it (this plugin), so there is nothing to yield to — and it
+        // describes the bytes on disk, which is precisely what we are looking at.
         await metaCore.setProperty(cid, 'extension', extension);
 
         const duration = Date.now() - startTime;

test/filename-guard.test.ts

@@ -0,0 +1,187 @@
+/**
+ * `fileName` precedence regression tests.
+ *
+ * `fileName` has two writers (METADATA_KEYS.md §`fileName`): this plugin, which
+ * knows a file's on-disk basename, and the indexer feeders, which emit the raw
+ * release string at ingest. They collide on one record whenever meta-share
+ * materialises a search hit into a tree meta-core watches.
+ *
+ * The regression these guard: a Usenet posting's on-disk name is the poster's,
+ * and posters obfuscate it — writing it unconditionally replaced the readable
+ * release string with `9765de45fa2d4522a80d01363d3c0919.mkv` on a record the
+ * whole UI reads.
+ *
+ * These drive the real write path against a stand-in meta-core, so they assert
+ * what is actually PUT rather than what the callback says.
+ */
+
+import { describe, it, expect, beforeAll, afterAll, beforeEach } from 'vitest';
+import * as http from 'http';
+import { promises as fs } from 'fs';
+import * as path from 'path';
+import * as os from 'os';
+import { verifyClaim } from '../src/meta-core-client.js';
+
+// Fixed test signing key (scalar 0x0101…01) — the plugin signs as this.
+process.env.METAMESH_SIGNING_KEY ??= '01'.repeat(32);
+
+let processFile: typeof import('../src/plugin.js').process;
+let configure: typeof import('../src/plugin.js').configure;
+
+/** Properties the stand-in meta-core currently holds, per cid. */
+let record: Record<string, string>;
+/** Every claim the plugin posted (`POST /api/claims`), in order. */
+let writes: Array<{ key: string; value: string }>;
+
+let server: http.Server;
+let metaCoreUrl: string;
+let testDir: string;
+/** A file whose basename is the obfuscated shape a Usenet poster produces. */
+let obfuscatedFile: string;
+
+const OBFUSCATED = '9765de45fa2d4522a80d01363d3c0919.mkv';
+const RELEASE = 'The.Magical.Revolution.of.the.Reincarnated.Princess-S01E09';
+
+const noopCallback = async (): Promise<void> => {};
+
+/** Run the plugin over the obfuscated-named file against the stand-in meta-core. */
+async function run(cid: string, existingMeta: Record<string, string> = {}): Promise<void> {
+    await processFile(
+        {
+            taskId: `task-${cid}`,
+            cid,
+            filePath: obfuscatedFile,
+            callbackUrl: 'http://localhost/callback',
+            metaCoreUrl,
+            existingMeta,
+        },
+        noopCallback
+    );
+}
+
+const written = (key: string): string | undefined => writes.find((w) => w.key === key)?.value;
+
+beforeAll(async () => {
+    const plugin = await import('../src/plugin.js');
+    processFile = plugin.process;
+    configure = plugin.configure;
+
+    testDir = await fs.mkdtemp(path.join(os.tmpdir(), 'file-info-guard-'));
+    obfuscatedFile = path.join(testDir, OBFUSCATED);
+    await fs.writeFile(obfuscatedFile, 'fake video content');
+
+    // Stand-in meta-core: just enough of the property API for this plugin.
+    server = http.createServer((req, res) => {
+        const url = new URL(req.url ?? '/', 'http://localhost');
+        const parts = url.pathname.split('/').filter(Boolean); // ['meta', cid, key?] or ['api', 'claims']
+        const key = parts[2];
+        if (req.method === 'GET' && key) {
+            const value = record[key];
+            if (value === undefined) {
+                res.writeHead(404).end();
+                return;
+            }
+            res.writeHead(200, { 'Content-Type': 'application/json' }).end(JSON.stringify({ value }));
+            return;
+        }
+        if (req.method === 'POST' && url.pathname === '/api/claims') {
+            let body = '';
+            req.on('data', (c) => (body += c));
+            req.on('end', () => {
+                const claims = JSON.parse(body || '[]') as Array<{ cid: string; uid: string; key: string; value: string; ts: number; sig: string }>;
+                const statuses = claims.map((c) => {
+                    if (!verifyClaim({ ...c, sig: Buffer.from(c.sig, 'base64') })) return { status: 'bad_signature' };
+                    writes.push({ key: c.key, value: String(c.value) });
+                    record[c.key] = String(c.value);
+                    return { status: 'accepted' };
+                });
+                res.writeHead(200, { 'Content-Type': 'application/json' }).end(JSON.stringify(statuses));
+            });
+            return;
+        }
+        res.writeHead(200, { 'Content-Type': 'application/json' }).end('{}');
+    });
+    await new Promise<void>((resolve) => server.listen(0, '127.0.0.1', resolve));
+    const addr = server.address() as { port: number };
+    metaCoreUrl = `http://127.0.0.1:${addr.port}`;
+});
+
+afterAll(async () => {
+    await new Promise<void>((resolve) => server.close(() => resolve()));
+    await fs.rm(testDir, { recursive: true, force: true });
+});
+
+beforeEach(() => {
+    record = {};
+    writes = [];
+    configure({}); // forceRecompute defaults back to off
+});
+
+describe('fileName precedence', () => {
+    it('never overwrites a release string a feeder already wrote', async () => {
+        record.fileName = RELEASE;
+
+        await run('cid-feeder-wrote-first');
+
+        expect(written('fileName')).toBeUndefined();
+        expect(record.fileName).toBe(RELEASE);
+    });
+
+    it('still writes every key it owns when it yields on fileName', async () => {
+        record.fileName = RELEASE;
+
+        await run('cid-other-keys-survive');
+
+        // `extension` has exactly one writer, so it is never withheld — and it
+        // describes the bytes on disk, which is what this plugin is looking at.
+        expect(written('extension')).toBe('mkv');
+        expect(written('sizeByte')).toBe('18');
+        expect(written('fileType')).toBeDefined();
+    });
+
+    it('writes fileName when the record carries none', async () => {
+        await run('cid-first-sighting');
+
+        expect(written('fileName')).toBe(OBFUSCATED);
+    });
+
+    it('writes fileName when the record already holds the same value', async () => {
+        record.fileName = OBFUSCATED;
+
+        await run('cid-same-value');
+
+        expect(record.fileName).toBe(OBFUSCATED);
+    });
+
+    it('overwrites when forceRecompute is on', async () => {
+        record.fileName = RELEASE;
+        configure({ forceRecompute: true });
+
+        await run('cid-forced');
+
+        expect(written('fileName')).toBe(OBFUSCATED);
+    });
+
+    /**
+     * Standalone / test mode: `getProperty` cannot reach meta-core and answers
+     * `null` for both "absent" and "unreachable", so the dispatch snapshot is
+     * the only evidence left that someone else owns the key.
+     */
+    it('falls back to existingMeta when meta-core is unreachable', async () => {
+        const unreachable = 'http://127.0.0.1:1';
+        await processFile(
+            {
+                taskId: 'task-offline',
+                cid: 'cid-offline',
+                filePath: obfuscatedFile,
+                callbackUrl: 'http://localhost/callback',
+                metaCoreUrl: unreachable,
+                existingMeta: { fileName: RELEASE },
+            },
+            noopCallback
+        );
+
+        // Nothing reached our stand-in meta-core, and nothing threw.
+        expect(writes).toHaveLength(0);
+    });
+});