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* chore: bump version to 0.9.0v0.9.0Christophe Besson2026-08-311-1/+1
| | | | | | Packaging system complete and verified on Ubuntu 26.04 and Fedora 44. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* feat: V13 — per-card "re-match this one file" (MNP 0.13)Christophe Besson2026-08-291-1/+5
| | | | | | | | | | | | | | | | | | | | | | | | A one-click alternative to the full "Fix match" search-and-pick flow, and reachable without SSH (`meshbay-node video rematch` clears a whole group). - MNP 0.13: tmdb_rematch / tmdb_rematch_ack (additive — an older node logs "unknown type", the button just does nothing). OP_TMDB_REMATCH, signed like tmdb_override (media_cache is shared node-wide). - media_cache.drop_tmdb_match(file_id): forgets the match AND the override marker — deliberately stronger than clear_file_tmdb, since the operator is explicitly asking for a fresh resolution. - webrtc_server: _do_tmdb_rematch / _admin_exec_tmdb_rematch, dispatch + admin-response routing, broadcasts tmdb_rematch_ack. - transport.js: rematchTmdbMatch(fileId, signFn); 'tmdb_rematch' in the admin-op allowlist; tmdb_rematch_ack handled like tmdb_override_ack. - video-app.js: a "Re-match" button beside "Fix match" in the detail modal (isNodeAdmin), then bumpMediaMetaGeneration(). video.rematch_one key in all ten locales. docs/mediacenter.md §10.1: V8–V13 marked done. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_018BMLQjqFGCize2KtNBT79v
* chore: release 0.8.00.8Christophe Besson2026-08-281-1/+1
| | | | | | | | | | | | | | | | | Bump the three packages to 0.8.0 (released together) and realign meshbay-common's __version__, which had drifted to 0.7.0 while the pyproject stayed at 0.6.0. Dependency pins updated to meshbay-common>=0.8.0. Protocol versions are independent and unchanged: MNP 0.12, MHP 0.1. The Electron client stays on its own 0.1.0 track (hub MIN_CLIENT_VERSION). Since 0.6/0.7: public-groups admin switch with full server-side enforcement and a group Revoke action; chat link previews (node-side URL unfurl, SSRF- gated); chat composer focus + scroll-to-bottom on tab entry; whole-group "Filter files" search. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_018gKJ85aZyvEwarXMFzFEwi
* feat(chat): link previews for pasted URLsChristophe Besson2026-08-281-1/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Paste an http(s) link in a group's chat and it unfurls into an OpenGraph card — title, description, site name, and image — the way WhatsApp/Signal/ Slack do it. The fetch is the node's, never the browser's or the hub's. The browser cannot: a strict img-src/connect-src and CORS block it, and a direct fetch would leak every reader's IP to the linked host on each render. The hub must not touch group content (draft-v6 §2.5). The node already fetches third-party metadata for the Videos and Music apps, over the same authorised path. Flow mirrors media_meta_req: the client sends `link_preview_req {url}`, the node replies `link_preview_resp` with the card fields (or `ok: false`), and any OG image is stored under its blake3 in the existing media_cache thumb store — the client then fetches it via the normal file_req path, exactly like a poster. Nothing durable is added: the card text lives in a bounded in-memory TTL cache on the node (draft-v6 §2.7 — enrichment on demand, the asking device caches), and MNP goes 0.11 → 0.12 (additive: an older node logs "unknown type" and the client shows the bare link). Because the URL is chosen by a *member* and triggers an outbound request from the operator's machine, `linkpreview.safe_url` is an SSRF gate: http(s) only, no credentials, and every resolved address must be globally routable — no loopback, private, link-local, multicast or reserved range, cloud-metadata included. Redirects are followed by hand so each hop is re-checked. Residual, documented in the module: DNS rebinding between the check and connect, closed properly by pinning the checked IP — a follow-up. Also fixes a long-standing chat annoyance the preview cards made worse: opening the Chat tab landed a screen or two above the newest message because the scroll-to-bottom ran before attachment thumbnails and (now) preview cards had loaded and grown the content. A ResizeObserver keeps the view pinned to the bottom through late content growth, and does nothing once the reader scrolls up. Tests: test_linkpreview.py (the SSRF gate and the OpenGraph parse, incl. redirect re-validation and image downscaling) and test_link_preview_request.py (reply shape, the media_cache image round-trip, the result cache). Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_018gKJ85aZyvEwarXMFzFEwi
* feat: add Photos group appChristophe Besson2026-08-251-1/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A new group application (docs/apps.md's plug-in mechanism), following the plan in docs/photos.md. Unlike Videos/Music: several photo roots per group instead of one (photo_roots is a set, one signed op replaces it whole), a single album-grid view with no third-party matching step, and per-photo info read from the file's own EXIF at index time — no metadata service, no credential, no outbound network call at all. Protocol (meshbay-common, MNP 0.10 -> 0.11, additive): `taken_at`/`camera` on IndexEntry; `photo_roots`/`photo_roots_ack`; `OP_PHOTO_ROOTS`. Node: roster.py stores photo_roots as a group_settings entry (JSON list, same shape as enabled_apps); ops.py/webrtc_server.py validate and sign the whole set in one op, same pattern as apps_enabled; a new PhotoEnricher (indexer/enrich_photo.py) runs Pillow in its own small bounded pool, separate from the video/audio pools, producing a resized thumbnail plus the two EXIF fields — never GPS, checked by a grep-based regression test. Client: photos-app.js — one album card per directory containing images, a per-album photo grid, and a lightbox with next/previous (keyboard and buttons), zoom in/out/fit/100% starting from the actual on-screen fit percentage, and a "zip this album" button reusing files-app.js's own zip mechanism (lifted into file-utils.js's downloadDirectory so both call the same implementation). group-settings.js gets an add/remove multi-root picker, distinct from Videos/Music's single-value one. Bugs found and fixed before this ever shipped, worth keeping the story of: - enrich_photo.py read width/height from the raw image *before* applying EXIF orientation correction, and read DateTimeOriginal off the plain 0th-IFD Exif object — a real camera stores it in the Exif sub-IFD, which Pillow only exposes via get_ifd(Exif). A flat, hand-built EXIF dict round-trips through Pillow either way, which is exactly what would have hidden both bugs; the regression test builds EXIF with piexif instead, matching what real hardware produces. - photos-app.js's album grouping stripped a trailing path segment from entry.path under the assumption it still carried a filename — it doesn't (files-app.js's own convention: e.path is already the containing directory), so every album collapsed one level into its parent. Found live against a real multi-folder library. - transport.js's ADMIN_OP_TYPES allowlist (already the fix for an identical bug on video_root/apps_enabled, see 4783d81) was missing photo_roots: its admin_challenge matched no pending request and was silently dropped, so saving a photo root just timed out after 30s with no error. - daemon.py pruned a thumbnail when its file left the index (root removed or reconfigured) but never forgot the content hash was "already attempted" — the same bytes reappearing under a renamed/relocated root (an operator's real workflow) were then permanently skipped, forever, with nothing to indicate why. Discarding the attempt alongside the cache entry on prune is what makes pruning actually reversible. - packages/meshbay-client's app:// protocol handler served every file with no Cache-Control header, so Chromium was free to serve a stale cached copy indefinitely — none of several `npm run sync-ui` + reload cycles during development actually picked up the new code until the renderer's disk cache was cleared by hand. Now sends Cache-Control: no-store. - the lightbox's zoomed image used flex centering (align-items/ justify-content: center) combined with overflow: auto — a well-known trap where the browser centers overflowing content by shifting it, and the leading half of that overflow (here, the top of a zoomed photo) sits outside what the scrollport can actually reach. Reported live as "unusable". Fixed by switching to top/left alignment once zoomed. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01TiZG4AuSnxHohQMpwTHTyL
* feat(node): add audio_root, gate Music enrichment on it like video_rootChristophe Besson2026-08-241-1/+7
| | | | | | | | | | | | | | | | | | | | | | | musicbay.md's original call — Music needs no root, tag reads are cheap so just cover the whole shared tree — didn't hold up against a real messy library: everything under every shared folder got mixed together with no way to scope Music down to an actual music collection. This adds an audio_root setting, symmetric to video_root in every respect: signed operator op (audio_root/audio_root_ack, MNP bumped to 0.10), validated against a real directory in the group's own roots before a signature is even asked for, gates tag/cover enrichment exactly like video_root gates ffprobe/TMDB (nothing runs until it's set, only files under it once it is), and a set/change fires a one-off sweep of whatever the folder already contains. The old trigger — sweep everything the instant "music" joins enabled_apps — is gone along with the root-less design it belonged to; setting audio_root is now the trigger, mirroring set_video_root's enrich_video_root_fn exactly. Test coverage mirrors the video_root suite: policy (refuse before a signature round trip, accept/store correctly) and the enrichment gate itself (nothing without a root, only files under it, sweep on set).
* feat(music): transcode WMA/Musepack to AAC so they actually playChristophe Besson2026-08-241-1/+7
| | | | | | | | | | | | | | | | | | | | | Tagging and covers for these two formats landed already, but neither one decodes in any mainstream browser's <audio> element at all — a real library scan turned up 273 such files that would show up correctly in the Music app and then simply fail on click. This closes that gap: the node transcodes to AAC/M4A on request (a one-shot whole-file conversion, not live-piped like video's fMP4 segments — an audio file is small enough that streaming it buys nothing), caches the result under its own content hash the same way a TMDB poster or a MusicBrainz cover is cached, and serves it back through the ordinary file_req/chunk path. That path used to assume anything in the media cache was thumbnail-sized (single chunk, always); generalized it to slice a cached blob the same way a real file on disk gets sliced, since a transcoded track can be several MB. New MNP pair (`audio_transcode_req`/`_resp`, version bump to 0.9), shares its concurrency cap with video's transcode pool rather than getting its own — both are real ffmpeg processes on the same node. Every other audio format is untouched: this only fires for .wma/.mpc, the two extensions that need it.
* feat(node): Music app node-side — indexing, MusicBrainz enrichment, protocolChristophe Besson2026-08-241-1/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Implements the node half of docs/musicbay.md against MNP 0.8: - IndexEntry gains artist/album/track_no (reuses duration/thumb_hash/ display_title, already generic). New musicbrainz_config/_enabled and music_meta_req/_resp message pairs, mirroring the TMDB shape. - title_parse.parse_track_filename: track-number-prefix + title parsing, fallback-only (embedded tags are the primary source, unlike Videos). - indexer.enrich_audio.AudioEnricher: mutagen-based tag/embedded-cover extraction through its own bounded pool (asyncio.to_thread, no subprocess — no ffmpeg-shaped deadlock risk). Gated on "music" in a group's enabled_apps rather than a video_root-style scoped folder. - musicbrainz.py: MusicBrainzClient — no API key (unlike TMDB), just a self-imposed ~1 req/s pace and a configurable, non-default User-Agent contact string; inert (no calls at all) when no contact is configured, never sends an unidentified client. - media_cache.py: file_mbid/mbid_meta tables alongside the existing TMDB ones, cover art reusing the thumbs table via a synthetic musicbrainz:{mbid} id, pruned on file deletion. - roster.py/ops.py/webrtc_server.py: musicbrainz_contact (node-wide) and musicbrainz_enabled (per-group, from the start) as signed operator settings, ALLOWED_APPS gains "music", _do_music_meta_request resolves and caches a release-level MusicBrainz match per (artist, album). - daemon.py: AudioEnricher/MusicBrainzClient wired alongside the video ones; a group's existing library is swept when "music" is newly enabled (no video_root equivalent — see musicbay.md §2.1). 41 new tests (musicbrainz.py against a mocked transport, admin-op policy for both new settings, media_cache round-trip/pruning, enrich_audio end-to-end against real ffmpeg-generated MP3s). Full suite (common + node + hub): 1116 passed, no regressions. Client-side (music-app.js, persistent player bar) not started yet. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01KBi7ALLGfwcjBXt57yNMcy
* fix(node,hub): HEVC transcode fallback, live-add progress, per-group TMDB toggleChristophe Besson2026-08-241-2/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Three bugs found live testing the Videos app against a real HEVC/EAC3 show, plus a design change requested afterward: - Streaming always did "-c:v copy", which faithfully reports a source's real hev1 codec string but is unplayable in a browser with no HEVC decoder (most Chrome/Linux builds). The node now transcodes to H264 whenever the probed codec is browser-incompatible (media_probe.py's new BROWSER_INCOMPATIBLE_VIDEO_CODECS), with a `transcode_incompatible_video` node.toml opt-out for operators who know their viewers already decode it. - Dropping a whole season into an already-watched folder gave no scanning indicator and no progress bar: IndexProgress was only ever updated by the two bulk scan paths, never by the real-time per-file watchdog path (_schedule_update/_debounce/_update_entry). That path now accounts a "burst" the same way, without double-counting a file rewritten mid-debounce. - A stray literal "0" rendered in the video detail modal when there was no TMDB match (`meta.confidence` is 0, and `0 && x` renders "0" in JSX/htm, not nothing) — `confident` is now a real boolean. - Whether TMDB is used at all moves from a node-wide setting to per-group (OP_TMDB_ENABLED/tmdb_enabled/tmdb_enabled_ack, scoped like OP_VIDEO_ROOT): an operator running a real media-library group alongside test/demo groups on one node wants outbound TMDB traffic for the one that needs it, not all of them. The custom API token and query language stay node-wide, one shared credential/cache (tmdb_config/OP_TMDB_CONFIG, unchanged reasoning). MNP_VERSION 0.6 -> 0.7, additive. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01LAmyXtc6dAADsH23ydXQpY
* feat(node,hub): season-specific overviews, manual TMDB match correction, and ↵Christophe Besson2026-08-241-1/+6
| | | | | | | | | | | | | | | | | | | | | | | | | wizard polish Two operator-facing fixes for a real 3-season show whose automatic TMDB match was wrong at the show level: per-season overview/air_date tabs in the detail modal (falling back to the show-level text when a season's own is empty), and a "Fix match…" search-and-correct affordance that re-resolves every file sharing the corrected show's display_title. New signed op OP_TMDB_OVERRIDE and two read-only pairs (season_meta_req/resp, tmdb_search_req/resp), MNP_VERSION 0.5 -> 0.6. Also: the create-group wizard gets a spinning indexing indicator and an app-selection step, group settings default the TMDB language to the operator's own locale (never as a global default), and a file renamed mid-session now re-triggers title parsing instead of being silently skipped by the enrichment dedup guard. Fixes two bugs found during this work: the search overlay's z-index lost to the base video-overlay class and rendered invisibly, and season_meta's own empty overview didn't fall back to the show-level one. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01LAmyXtc6dAADsH23ydXQpY
* feat(node,hub): add Videos group app (poster grid, flat list, TMDB metadata)Christophe Besson2026-08-241-1/+6
| | | | | | | | | | | | | | | | | | | | | Implements docs/mediacenter.md: a "Videos" group application built on the existing files index rather than a separate catalogue. On the node side, new indexer enrichment (technical probe, filename/season parsing, thumbnail generation) runs per-file once an operator has chosen a video_root for the group, plus a TMDB client for on-demand poster/metadata lookups (never client-side, thumbnails delivered over the existing chunk path). On the hub side, a new video-app.js renders a lazily-mounted poster grid or a thumbnail-only flat list, with TMDB entirely optional per group. Along the way: the global apps registry now drives Settings' default-tab picker instead of a hardcoded list, and the video_root is configured from group Settings (like uploads) rather than from Files, with the node refusing to run any TMDB/thumbnail work until one is set. Fixes several bugs found via live testing against a real library, notably a race between two effects writing the same "image ready" state that could leave a poster grid spinning forever on a same-tab revisit — see mediacenter.md §5.4 for the full account of each one.
* chore: release 0.6.00.6Christophe Besson2026-08-231-2/+6
| | | | | | | | | | | | | The group UI's applications split, and the two missing-import bugs it surfaced and fixed along the way. MNP goes to 0.4: apps_enabled/apps_enabled_ack, and enabled_apps on the handshake ack, for the group-applications registry. Additive — a node that predates it is never sent the op, and a client that predates it never looks for the field. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_016SF6RKNBKg9qejmoMJ9ybA
* feat(node): several named roots per group, and one implementation per operationChristophe Besson2026-08-181-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Stage A — a group's content is a set of named roots --------------------------------------------------- `shared_dir` becomes a list of {name, path, kind}. The name is the directory's basename, derived once at add time and *stored*: recomputing it would re-identify a whole library the day someone renames a folder on disk. Duplicate names are refused case-insensitively and no root may contain another — both compared with NFC folding, because most of these directories live on exFAT or NTFS where `Films` and `films` are one directory. Every index path carries its root name, in a one-root group as much as in a five-root one. One path shape has to be got right once; two have to be kept right for ever. **A root that goes away freezes; it never empties.** Unmounting a volume makes watchdog report every file under it as deleted, or presents an empty directory to the next scan. Acting on either propagates deletions for a whole library to every member, as though the owner had erased it. So a deletion is acted on only once its root is confirmed readable, and availability is tracked per root — one unplugged drive leaves the others serving. 12 tests, verified to fail against an indexer without the check. Events are not trusted to be complete either: ReadDirectoryChangesW drops them under load and inotify on a FUSE mount misses changes made outside it. A periodic reconciliation sweep is the only thing that recovers a missed event. MNP 0.2 → 0.3 (additive). The hub needs no change: SwarmSource carries a content hash, a node id and an endpoint — no paths, no filenames — and private groups register nothing (H7). Stage B — one implementation behind every front door ---------------------------------------------------- C1 and C6 were both "a second path into the node with its own weaker handshake". Two implementations of `revoke` with two authorization checks is that shape one size down. `meshbay_node/ops.py` holds each operation once, takes the daemon state, and knows nothing about HTTP, argv or MNP. The loopback API is one `_op(...)` line per endpoint; the MNP handlers call the same functions. test_ops.py asserts the shape rather than trusting it. Phase 14 is finished on top of it — `group list`, `gek init|rotate`, `reload` (SIGHUP), `denylist show|clear`, `file list|rm`. **No operator action requires a browser any more.** Plus `gek_rotate` and `member_unpin` as operator-signed MNP operations: rotation is the half of revocation that revocation cannot do, since the ex-member holds the current key, and the node generates the replacement with its own CSPRNG — no key material crosses the wire, which is what the C5b rule is actually about. Two bugs found by running it rather than by testing it ------------------------------------------------------ GroupIndex is keyed by **content hash**, so the same bytes at two paths are one entry — which is also why a scan reports ten files and indexes nine. Reconciliation compared paths, so it decided the second path was a missed event every 60 s, rewrote the entry and pushed an index update to every connected peer. Seen in a live node's log. `meshbay-node reload` crashed on first use with `subprocess` unimported: the module compiles fine, which is the "syntax, not names" trap already recorded for the SPA. test_cli_dispatch.py now walks every verb and refuses to let one be added to the parser without an entry there. Also corrected: protocol.py declared a second MNP_VERSION of "0.1" while the wire carried "0.2" — harmless only because nothing imported it. And _do_dir_create/_do_dir_delete referenced an undefined `filename` on their error path. 740 tests pass; QE/deploy/e2e.py passes end to end against the live deployment. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
* feat(common): MNP 0.2 — liveness, and chat history read the way it is writtenChristophe Besson2026-08-161-2/+5
| | | | | | | | | | | | | | | | | | | | | | | | `get_messages` pages forward from the oldest message. That is the right shape for "what happened since I last looked" and the wrong one for opening a conversation, and the browser asked it for `since=0, limit=200` — so a group with more than two hundred messages showed its first two hundred and the exchange anyone came for was unreachable. Demonstrated on 300 messages: the newest was simply absent from the answer. `get_recent` and `get_before` page backwards, cursored on the row id rather than the timestamp. Nothing makes a `time.time()` float unique, and a cursor on a value two rows can share eventually skips a message or repeats it. PING/PONG covers liveness on an already-open channel: a DataChannel whose peer vanished without closing still reads as connected, and nothing noticed until a real request hung. It is not a discovery mechanism — opening a connection to ping costs a full ICE/DTLS handshake, measured at 0.6-7 s across two ISPs — so presence in the group list comes from the hub's registry instead. Both additions are backward compatible: an 0.1 peer sends no `before` and is answered with the newest page, which is what it wanted. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
* chore: release 0.4.00.4Christophe Besson2026-08-161-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | The web client speaks ten languages instead of one: French, Spanish, Brazilian Portuguese, Simplified Chinese, Japanese, German, Italian, Dutch and Polish, all formal, with `hub`, `node` and `GEK` deliberately left in English so the interface still matches the CLI and the docs. Catalogues are fetched per language rather than shipped together, plural forms go through Intl.PluralRules because Polish needs four of them, and locale matching keeps the region so pt-BR and zh-CN resolve to the files written for them. Splitting one module into a loader and ten catalogues gave the SPA a version dependency it did not have before, and the hub was serving static assets with no explicit freshness at all. A browser that cached half a deploy either rendered every string as its own key or, in the other direction, failed to link the module graph and showed nothing. Static responses now carry no-cache, which costs one conditional request and answers 304 with no body. The node and common packages carry no functional change; they move with the version because the three are released together. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
* chore: release 0.3.00.3Christophe Besson2026-08-151-1/+1
| | | | | | | | | | | | | | | | | | | | | | | Twenty-one commits since 0.2, and enough of them change what the thing does that moving the old tag would have been the wrong description. Node: video streaming paced by the client rather than pushed at it, and a stream that ends when the viewer closes instead of holding a transcode slot for two minutes. An operator can remove an empty directory and revoke a member over MNP. `meshbay-node group add` attaches another hub group without hand-editing node.toml. The node.toml operator key is gone; the roster is the only source of authority. Hub and web client: transfers outlive the page that started them, with a widget that shows the rate and can cancel them; downloads stream to disk in every browser, through the File System Access API where it exists and a service worker where it does not; a folder can be taken as a zip built in the browser. A group owner can remove a member and edit the description. Nodes are recorded at the address their signed announcement arrived from, not the one STUN told them about. Deleted accounts stop being counted while the connection log keeps their name. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
* chore: release 0.2.00.2Christophe Besson2026-08-141-1/+1
| | | | | | | | | | | | All three packages together, as the conventions require, plus the RPM and DEB metadata and their changelogs. The tag said 0.2 while every package announced 0.1.0, which would have shipped an RPM claiming to be the reviewed build while containing a different protocol: the hub schema lost the user identity keys, tokens lost pk_user, and gek_bundle_store left the wire. Pre-1.0, a breaking change bumps MINOR. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
* chore: initialize monorepo structure for MeshBayChristophe Besson2026-08-091-0/+5
3-package layout: meshbay-common (shared crypto/protocol), meshbay-hub (FastAPI server), meshbay-node (local daemon). Includes validated POC spikes 1-6 in poc/, architecture drafts v1/v2 in docs/, and CLAUDE.md project conventions. All cryptographic primitives extracted from POC into meshbay_common/crypto.py (GEK wrap/unwrap, chunk key derivation, keystore encryption, chunk signing). Co-Authored-By: Claude Sonnet 4.6 (1M context) <noreply@anthropic.com>