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indiekit-server/README.md

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indiekit-blog

Personal Indiekit deployment for blog.giersig.eu.

Built on top of the rmdes/indiekit fork ecosystem. Several packages are sourced from custom forks (see below) and a set of patch scripts handle fixes that cannot yet be upstreamed.


Fork-based dependencies

Three packages are installed directly from GitHub forks rather than the npm registry:

Dependency Source Reason
@rmdes/indiekit-endpoint-activitypub svemagie/indiekit-endpoint-activitypub Alpine.js fix for reader buttons + private-address document loader for self-hosted Fedify instances
@rmdes/indiekit-endpoint-blogroll svemagie/indiekit-endpoint-blogroll#bookmark-import Bookmark import feature
@rmdes/indiekit-endpoint-microsub svemagie/indiekit-endpoint-microsub#bookmarks-import Bookmarks import feature

In package.json these use the github:owner/repo[#branch] syntax so npm fetches them directly from GitHub on install.

Lockfile caveat: The fork dependency is resolved to a specific commit in package-lock.json. When fixes are pushed to the fork, run npm update @rmdes/indiekit-endpoint-activitypub to pull the latest commit. The current lockfile pins to eefa46f (v2.10.1); the fork HEAD is at 8b9bff4 with additional AP reliability fixes baked in.


ActivityPub federation

The blog is a native ActivityPub actor (@svemagie@blog.giersig.eu) powered by Fedify v2.0.3 via the @rmdes/indiekit-endpoint-activitypub package. All federation routes are mounted at /activitypub.

Actor identity

Field Value
Handle svemagie (AP_HANDLE env var)
Actor URL https://blog.giersig.eu/activitypub/users/svemagie
Actor type Person
WebFinger acct:svemagie@blog.giersig.eu
Migration alias https://troet.cafe/users/svemagie (AP_ALSO_KNOWN_AS)

Key management

Two key pairs are persisted in MongoDB (ap_keys collection) and loaded by the key pairs dispatcher:

Algorithm Purpose Storage format Generation
RSA 2048-bit HTTP Signatures (Mastodon/Pleroma standard) PEM (publicKeyPem + privateKeyPem) preflight-activitypub-rsa-key.mjs at startup
Ed25519 Object Integrity Proofs (newer standard) JWK (publicKeyJwk + privateKeyJwk) Auto-generated on first use

The RSA key is mandatory. The preflight script generates it if missing and repairs broken documents. Ed25519 is optional and fails gracefully.

Message queue and delivery

Post created via Micropub
    ↓
syndicator.syndicate(properties)
    ↓
jf2ToAS2Activity() → Create/Like/Announce
    ↓
ctx.sendActivity({ identifier }, "followers", activity, {
    preferSharedInbox: true,     // batch by shared inbox
    syncCollection: true,        // FEP-8fcf collection sync
    orderingKey: postUrl,        // deduplication
})
    ↓
Redis message queue (5 parallel workers)
    ↓
Fedify signs with RSA key → HTTP POST to follower inboxes

Queue backends:

Backend When used Notes
RedisMessageQueue + ParallelMessageQueue (5 workers) REDIS_URL is set Production: persistent, survives restarts
InProcessMessageQueue No Redis Not production-safe: queue lost on restart

KV store: Redis (RedisKvStore) when available, otherwise MongoDB (MongoKvStore). Stores idempotence records, public key cache, remote document cache.

Federation options

createFederation({
    kv,
    queue,
    signatureTimeWindow: { hours: 12 },  // accept Mastodon retry signatures
    allowPrivateAddress: true,            // own-site resolves to 10.100.0.10
});
  • signatureTimeWindow: { hours: 12 } — Mastodon retries failed deliveries with the original signature, which can be hours old. Without this, retries are rejected.
  • allowPrivateAddress: true — blog.giersig.eu resolves to a private IP (10.100.0.10) on the home LAN. Without this, Fedify's SSRF guard blocks WebFinger and lookupObject() for own-site URLs, breaking federation.

Inbox handling

Incoming activities go through createFedifyMiddlewarefederation.fetch(). Registered inbox listeners:

Activity type Handler
Follow Accept/store in ap_followers
Undo Remove follow/like/announce
Like Store in ap_activities
Announce Store in ap_activities
Create Store in ap_activities (notes, replies)
Delete Remove referenced activity
Update Update referenced activity
Flag Log report
Move Update follower actor URL
Block Remove follower
View No-op (PeerTube watch events, silently ignored)

Outbox and collections

Collection MongoDB collection Endpoint
Outbox ap_activities /activitypub/users/svemagie/outbox
Followers ap_followers /activitypub/users/svemagie/followers
Following ap_following /activitypub/users/svemagie/following
Liked ap_interactions /activitypub/users/svemagie/liked
Featured ap_featured /activitypub/users/svemagie/featured

JF2 to ActivityStreams conversion

Posts are converted from Indiekit's JF2 format to ActivityStreams 2.0 in two modes:

  1. jf2ToAS2Activity() — Fedify vocab objects for outbox delivery (Create wrapping Note/Article)
  2. jf2ToActivityStreams() — Plain JSON-LD for content negotiation on post URLs
Post type Activity Object Notes
note Create Note Plain text/HTML content
article Create Article Has name (title) and optional summary
like Like URL Outbox serves as Note for Mastodon compatibility
repost Announce URL Outbox serves as Note for Mastodon compatibility
bookmark Create Note Content prefixed with bookmark emoji + URL
reply Create Note inReplyTo set, author CC'd and Mentioned

Visibility mapping:

Visibility to cc
public (default) as:Public followers
unlisted followers as:Public
followers followers (none)

Content processing:

  • Bare URLs auto-linked via linkifyUrls()
  • Permalink appended to content body
  • Nested hashtags normalized: on/art/music#music (Mastodon doesn't support path-style tags)
  • Sensitive posts flagged with sensitive: true; summary doubles as CW text for notes

Express ↔ Fedify bridge

federation-bridge.js converts Express requests to standard Request objects for Fedify:

  • Body buffering: For application/activity+json POSTs, the raw stream is buffered into req._rawBody (original bytes) and req.body (parsed JSON). This is critical because JSON.stringify(req.body) produces different bytes than the original, breaking the Digest header that Fedify uses for HTTP Signature verification.
  • PeerTube View short-circuit: If the buffered body has type === "View", returns 200 immediately before Fedify's JSON-LD parser sees it (PeerTube's Schema.org extensions crash the parser).
  • Mastodon attachment fix: sendFedifyResponse() ensures attachment is always an array (JSON-LD compaction collapses single-element arrays, breaking Mastodon's profile field display).

AP-specific patches

These patches are applied to node_modules via postinstall and at serve startup. They're needed because the lockfile pins the fork to v2.10.1 which predates some fixes, and because some fixes cannot be upstreamed.

Patch Target What it does
patch-ap-allow-private-address federation-setup.js Adds signatureTimeWindow and allowPrivateAddress to createFederation()
patch-ap-object-url-trailing-slash federation-setup.js Object dispatcher uses $in query to match URLs with/without trailing slash
patch-ap-url-lookup-api Adds new route Public GET /activitypub/api/ap-url resolves blog URL → AP object URL
patch-ap-normalize-nested-tags jf2-to-as2.js Strips path prefix from nested hashtags (on/art/music#music)
patch-inbox-skip-view-activity-parse federation-bridge.js Buffers body, skips PeerTube View, preserves _rawBody for Digest verification
patch-inbox-ignore-view-activity inbox-listeners.js Registers no-op View handler to suppress "Unsupported activity type" errors
patch-federation-unlisted-guards endpoint-syndicate Prevents unlisted posts from being re-syndicated (AP fork has this natively)
patch-endpoint-activitypub-locales locales Injects German (de) translations for the AP endpoint UI

AP environment variables

Variable Default Purpose
AP_HANDLE "svemagie" Actor handle (username part of @handle@domain)
AP_ALSO_KNOWN_AS Mastodon profile URL for account migration (alsoKnownAs)
AP_LOG_LEVEL "info" Fedify log level: debug / info / warning / error / fatal
AP_DEBUG Set to 1 or true to enable Fedify debug dashboard at /activitypub/__debug__/
AP_DEBUG_PASSWORD Password-protect the debug dashboard
REDIS_URL Redis connection string for message queue + KV store

Troubleshooting

ERR fedify·federation·inbox Failed to verify the request's HTTP Signatures The body buffering patch must preserve raw bytes in req._rawBody. If JSON.stringify(req.body) is used instead, the Digest header won't match. Check that patch-inbox-skip-view-activity-parse applied correctly.

Activities appear in outbox but Mastodon doesn't receive them

  1. Check Redis connectivity: redis-cli -h 10.100.0.20 ping
  2. Look for [ActivityPub] Using Redis message queue in startup logs
  3. Set AP_LOG_LEVEL=debug to see Fedify delivery attempts
  4. Verify allowPrivateAddress: true is in createFederation() — without it, Fedify blocks own-site URL resolution

Patch chain dependency: patch-ap-allow-private-address adds both signatureTimeWindow and allowPrivateAddress. It handles both fresh v2.10.1 (no prior patches) and already-patched files. If it logs "snippet not found — skipping", the base code structure has changed and the patch needs updating.


Patch scripts

Patches are Node.js .mjs scripts in scripts/ that surgically modify files in node_modules after install. They are idempotent (check for a marker string before applying) and run automatically via postinstall and at the start of serve.

ActivityPub

See also the ActivityPub federation section above for a full architecture overview.

patch-ap-allow-private-address.mjs Adds signatureTimeWindow: { hours: 12 } and allowPrivateAddress: true to createFederation(). Handles both fresh v2.10.1 and already-patched files. Without this, Fedify rejects Mastodon retry signatures and blocks own-site URL resolution on the private LAN.

patch-ap-normalize-nested-tags.mjs Strips path prefix from nested hashtags in JF2→AS2 conversion (on/art/music#music). Mastodon doesn't support slash-delimited tag paths.

patch-ap-object-url-trailing-slash.mjs Replaces exact-match findOne() in the object dispatcher with a $in query that tries both postUrl and postUrl + "/". Posts in MongoDB have trailing slashes; AP object URLs don't.

patch-ap-url-lookup-api.mjs Adds a public GET /activitypub/api/ap-url?url= endpoint that resolves a blog post URL to its canonical Fedify-served AP object URL. Used by the "Also on fediverse" widget for authorize_interaction.

patch-inbox-skip-view-activity-parse.mjs Buffers incoming ActivityPub request bodies, short-circuits PeerTube View activities (returns 200), and preserves original bytes in req._rawBody for HTTP Signature Digest verification. Without the raw body preservation, JSON.stringify() produces different bytes and Fedify rejects all incoming activities.

patch-inbox-ignore-view-activity.mjs Registers a no-op .on(View, ...) inbox handler to suppress "Unsupported activity type" error logs from PeerTube watch broadcasts.

patch-endpoint-activitypub-locales.mjs Injects German (de) locale overrides into @rmdes/indiekit-endpoint-activitypub (e.g. "Benachrichtigungen", "Mein Profil"). The package ships only an English locale; this copies and customises it.

Conversations

patch-conversations-collection-guards.mjs Adds null-safety guards to conversation-items.js so the endpoint does not crash when the MongoDB conversation_items collection is missing or empty (returns an empty cursor instead of throwing).

patch-conversations-mastodon-disconnect.mjs Patches the conversations endpoint to handle a missing or disconnected Mastodon account gracefully — prevents startup crashes when Mastodon credentials are not configured.

Files

patch-endpoint-files-upload-route.mjs Fixes the file upload XHR to POST to window.location.pathname instead of a hardcoded endpoint path, which broke uploads behind a custom mount prefix. Also adds fallback text for missing locale keys.

patch-endpoint-files-upload-locales.mjs Injects German locale strings for the files endpoint.

Media

patch-endpoint-media-scope.mjs Changes the scope check from strict equality (scope === "create") to scope.includes("create") so tokens with compound scopes (e.g. "create update") can still upload media.

patch-endpoint-media-sharp-runtime.mjs Wraps the sharp import with a lazy runtime loader so the server starts even if the native sharp binary is missing (falls back gracefully rather than crashing at import time).

Frontend

patch-frontend-sharp-runtime.mjs Same lazy sharp runtime guard applied to @indiekit/frontend/lib/sharp.js (avatar/image processing). Handles multiple nested copies of the package across the dependency tree.

patch-frontend-serviceworker-file.mjs Ensures @indiekit/frontend/lib/serviceworker.js exists at the path the service worker registration expects, copying it from whichever nested copy of the package is present.

patch-lightningcss.mjs Fixes the ~module/path resolver in lightningcss.js to use require.resolve() correctly, preventing CSS build failures when module paths contain backslashes or when package hoisting differs.

Micropub

patch-endpoint-micropub-where-note-visibility.mjs Defaults OwnYourSwarm /where check-in notes to visibility: unlisted unless the post explicitly sets a visibility. Prevents accidental public syndication of location check-ins.

patch-micropub-ai-block-resync.mjs Detects stale AI-disclosure block files and re-generates them on next post save. Fixes posts that had MongoDB AI fields set but missing or empty _ai-block.md sidecar files (caused by a previous bug where supportsAiDisclosure always returned false).

Posts

patch-endpoint-posts-ai-fields.mjs Adds AI disclosure field UI (text level, code level, etc.) to the post creation/editing form in @rmdes/indiekit-endpoint-posts.

patch-endpoint-posts-ai-cleanup.mjs Removes AI disclosure fields from the post form submission before saving, delegating persistence to the AI block sidecar system.

patch-endpoint-posts-uid-lookup.mjs Fixes post editing 404s by adding uid-based lookup to the micropub source query. Without this, posts older than the first 40 results could not be opened for editing.

patch-endpoint-posts-prefill-url.mjs Pre-fills the reference URL when creating posts from the /news "Post" button (/posts/create?type=like&url=…). The standard postData.create only reads request.body, ignoring query params.

Preset / Eleventy

patch-preset-eleventy-ai-frontmatter.mjs Adds AI disclosure fields (aiTextLevel, aiCodeLevel, etc.) to the Eleventy post template frontmatter so they are written into generated content files.

Federation / Syndication

patch-federation-unlisted-guards.mjs Prevents unlisted posts from being re-syndicated via @indiekit/endpoint-syndicate. The corresponding guards in @rmdes/indiekit-endpoint-activitypub are now built into the fork directly.

Indiekit core

patch-indiekit-routes-rate-limits.mjs Replaces the single blanket rate limiter with separate strict (session/auth) and relaxed (general) limiters so legitimate API traffic is not throttled during normal use.

patch-indiekit-error-production-stack.mjs Strips stack traces from error responses in NODE_ENV=production to avoid leaking internal file paths to clients.

patch-indieauth-devmode-guard.mjs Gates dev-mode auto-login behind an explicit INDIEKIT_ALLOW_DEV_AUTH=1 env var so devMode: true in config does not accidentally bypass authentication in staging/production. Also widens the redirect URL regex to allow encoded characters (%, .).

Endpoints — misc

patch-endpoint-homepage-locales.mjs Injects German locale strings for the homepage endpoint.

patch-endpoint-homepage-identity-defaults.mjs Sets fallback values for identity fields on the dashboard when they are not configured, preventing blank/undefined display names.

patch-endpoint-blogroll-feeds-alias.mjs Dual-mounts the blogroll public API at both /blogrollapi and /rssapi, and adds a /api/feeds alias for /api/blogs, so existing static pages that reference different base paths all resolve correctly.

patch-endpoint-comments-locales.mjs Injects German locale strings for the comments endpoint.

patch-endpoint-github-changelog-categories.mjs Extends the GitHub changelog controller with additional commit category labels.

patch-endpoint-podroll-opml-upload.mjs Adds OPML file upload support to the podroll endpoint.

Microsub / Reader

// patch-microsub-reader-ap-dispatch.mjs Adds Fediverse/ActivityPub detection and dispatch to the Microsub reader so AP profile URLs are routed to the ActivityPub reader rather than the RSS reader.

patch-microsub-feed-discovery.mjs Improves feed discovery in fetchAndParseFeed: when a bookmarked URL is an HTML page, falls back to <link rel="alternate"> discovery and a broader set of candidate paths rather than only the fixed short list.

Listening (Funkwhale / Last.fm)

patch-listening-endpoint-runtime-guards.mjs Applies several guards to the listening endpoints: scopes Funkwhale history fetches to the authenticated user (scope: "me") rather than the entire instance, and adds null-safety for missing credentials so the server doesn't crash when these services aren't configured.

Webmention sender

patch-webmention-sender-livefetch.mjs Forces the webmention sender to always fetch the live published page rather than using the stored post body. Ensures outgoing webmentions contain the full rendered HTML including all microformats. Rewrites the fetch URL via INTERNAL_FETCH_URL for jailed setups.

patch-webmention-sender-reset-stale.mjs One-time migration (guarded by a migrations MongoDB collection entry) that resets posts incorrectly marked as webmention-sent with empty results because the live page was not yet deployed when the poller first fired.

Bluesky syndicator

patch-bluesky-syndicator-internal-url.mjs Rewrites own-domain fetch URLs in the Bluesky syndicator to INTERNAL_FETCH_URL for jailed setups. Covers uploadMedia() (photo uploads), uploadImageFromUrl() (OG image thumbnails), and fetchOpenGraphData() (OG metadata extraction).

Internal URL rewriting

patch-micropub-fetch-internal-url.mjs Rewrites self-referential fetch URLs to INTERNAL_FETCH_URL (or http://localhost:PORT) across multiple endpoints: endpoint-syndicate, endpoint-share, microsub reader, activitypub compose, endpoint-posts, indieauth token exchange, token introspection, and media uploads. Required for jailed setups where the server cannot reach its own public HTTPS URL.

patch-syndicate-force-checked-default.mjs When force-syndicating a post with no mp-syndicate-to and no existing syndication URLs, falls back to targets with checked: true instead of doing nothing.


Preflight scripts

Run at the start of serve before the server starts. They fail fast with a clear message rather than letting the server start in a broken state.

Script Checks
preflight-production-security.mjs PASSWORD_SECRET is set and bcrypt-hashed; blocks startup if missing in strict mode
preflight-mongo-connection.mjs MongoDB is reachable; blocks startup if connection fails in strict mode
preflight-activitypub-rsa-key.mjs RSA key pair for ActivityPub exists in MongoDB; generates one if absent
preflight-activitypub-profile-urls.mjs ActivityPub actor URLs are correctly configured; warns on mismatch

Server architecture

The production setup uses two FreeBSD jails managed by Bastille:

                    ┌─────────────────────────────────────────┐
  Internet ──▶ 443 │  web jail (10.100.0.10)                 │
                    │  nginx — terminates TLS                 │
                    │  • static files (Eleventy _site output) │
                    │  • proxy_pass dynamic → node jail :3000 │
                    │  • port 80 for internal fetches (no TLS)│
                    └───────────────┬─────────────────────────┘
                                    │ http://10.100.0.20:3000
                    ┌───────────────▼─────────────────────────┐
                    │  node jail (10.100.0.20)                │
                    │  Indiekit (Express on port 3000)        │
                    │  MongoDB (localhost or separate jail)    │
                    └─────────────────────────────────────────┘

Internal fetch URL

The node jail cannot reach the public HTTPS URL (https://blog.giersig.eu) because TLS terminates on the web jail. Several features need to fetch their own pages or static assets:

  • Webmention sender — fetches live page HTML for link extraction
  • Bluesky syndicator — fetches photos for upload, OG metadata/images for link cards
  • Micropub/syndicate — self-fetches for token introspection, post updates

All of these use a shared _toInternalUrl() helper (injected by patch scripts) that rewrites the public base URL to INTERNAL_FETCH_URL. This should point to the nginx web jail's HTTP (port 80) listener, which serves both static files and proxies dynamic routes to Indiekit — without TLS.

INTERNAL_FETCH_URL=http://10.100.0.10

nginx port 80 configuration

The internal HTTP listener must:

  1. Serve content directly (not redirect to HTTPS)
  2. Set X-Forwarded-Proto: https so Indiekit's force-https middleware does not redirect internal requests back to HTTPS
  3. Proxy dynamic routes to the node jail, serve static files from the Eleventy build output
# Internal HTTP listener — used by Indiekit for self-fetches.
# Not exposed to the internet (firewall blocks external port 80).
server {
    listen 10.100.0.10:80;
    server_name blog.giersig.eu;

    # Tell Indiekit this is the real domain (not 10.100.0.10) and
    # that TLS was terminated upstream so force-https doesn't redirect.
    proxy_set_header Host blog.giersig.eu;
    proxy_set_header X-Forwarded-Proto https;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

    # Static files from Eleventy build (rsynced to /usr/local/www/blog)
    location /images/ { root /usr/local/www/blog; }
    location /og/     { root /usr/local/www/blog; }

    # Everything else → Indiekit
    location / {
        proxy_pass http://10.100.0.20:3000;
    }
}

Key environment variables (node jail .env)

Variable Example Purpose
INTERNAL_FETCH_URL http://10.100.0.10 nginx HTTP endpoint for self-fetches
INDIEKIT_BIND_HOST 10.100.0.20 Jail IP (loopback unavailable in jails); used by webmention poller
PORT 3000 Indiekit listen port (default 3000)

Setup

npm install       # installs dependencies and runs all postinstall patches
npm run serve     # runs preflights + patches + starts the server

Environment variables are loaded from .env via dotenv. See indiekit.config.mjs for the full configuration.


Changelog

2026-03-14

chore: upgrade checkout and setup-node actions to v4 (d3fb055) Upgraded actions/checkout and actions/setup-node from v3 to v4. Addresses the Node.js 20 deprecation warning ahead of the June 2026 forced migration to Node.js 24.

chore: update comments-locales patch for 1.0.10 template, drop livefetch patch (53b40a5) Updated patch-endpoint-comments-locales to match the rewritten comments.njk template (Nunjucks macros + badge()). Removed obsolete locale keys and deleted the orphaned patch-webmention-sender-livefetch script.

chore: update @indiekit/ to beta.27, bump endpoint-comments and webmention-sender* (53bb7d3)

  • @indiekit/indiekit, @indiekit/store-github: beta.25 → beta.27
  • @rmdes/indiekit-endpoint-comments: 1.0.0 → 1.0.10
  • @rmdes/indiekit-endpoint-webmention-sender: 1.0.6 → 1.0.7

fix: buffer ActivityPub body before checking for PeerTube View activities (314a085) Express's JSON body parser ignores application/activity+json, so req.body was always undefined and the PeerTube View guard never fired. Now manually buffers and parses the raw stream for activity+json/ld+json POSTs before the type check.

chore: remove Mastodon syndicator and related patches (3708dd9) Removed the Mastodon syndicator package, config vars, patch script, and .env example entries. The blog is now a native ActivityPub actor.

fix: skip PeerTube View activities before Fedify JSON-LD parse (296745f) Added an early guard in createFedifyMiddleware that short-circuits any POST with body.type === "View" and returns 200 immediately, preventing Fedify from crashing on PeerTube's non-standard View activities.

fix: silently ignore PeerTube View activities in ActivityPub inbox (f004ecd) Added a no-op .on(View, ...) inbox handler to suppress noisy "Unsupported activity type" errors from PeerTube's per-watch broadcasts.

feat: add gardenStage and ai fields to all post type presets (304c75f)

  • gardenStage: added to all post types
  • aiTextLevel, aiCodeLevel, aiTools, aiDescription: extended to all content post types (bookmark, repost, photo, reply, page)

fix: register bluesky cursor-fix patch in postinstall and serve scripts (3781503) Ensured the Bluesky cursor-fix patch runs during both postinstall and serve.

fix: clear stale Bluesky polling cursor to restore interaction ingestion (655bc73) Cleared a stale cursor that was blocking new Bluesky interactions from being ingested.

fix: filter out self-interactions from own Bluesky account (4f1440a, f8f595f) Filtered out likes, reposts, and replies from the blog's own Bluesky account to prevent self-syndication loops.

fix: scope webmention link extraction to .h-entry not .e-content (b632af9) u-in-reply-to, u-like-of, u-repost-of etc. are rendered before .e-content, not inside it. Scoping to .h-entry .e-content caused them to be missed. Bumped reset-stale migration to v3 to retry affected posts.

fix: improve microsub feed discovery via <link rel="alternate"> tags (3ca9200) fetchAndParseFeed now calls discoverFeeds() on the fetched HTML before probing common paths, using any typed RSS/Atom/JSONFeed <link rel="alternate"> it finds.

fix: pre-fill reference URL when creating post from /news entry (0dc71d1) postData.create previously only read request.body, ignoring query params. Now seeds properties from ?url=/?name= per post type: like-of, bookmark-of, in-reply-to, repost-of.

fix: post edit 404 — query micropub source by _id not paginated scan (1d28df8) getPostProperties was scanning the 40 most-recent posts for a uid match, returning 404 for any older post. Fixed by patching the micropub query controller to perform a direct findOne({ _id: getObjectId(uid) }) when ?q=source&uid= is present.