Add a conventional per-request OTel server span using the standard
tracing-actix-web middleware (TracingLogger) as the outermost middleware,
so the whole request lives under one root span and an incoming W3C
traceparent is extracted onto it via the global text-map propagator
(installed in #138).
extract_context_from_request now sources the operation span's parent from
that root span (tracing::Span::current().context()) instead of re-parsing
the header, so per-handler operation spans nest under the root span as
one trace tree rather than duplicating it as a sibling. Header parsing
remains as a fallback for handlers invoked without the middleware (tests).
The literal per-handler span boilerplate is intentionally NOT removed here;
it becomes #[instrument] in the LLM (#140) and DAO (#141) migrations, where
the &Context threading disappears entirely.
tests/otel_traceparent.rs pins the behavior end-to-end: an incoming
traceparent's trace_id propagates to the request, the root span is parented
on the caller's (remote) span, and the operation span nests under the root
span rather than alongside it.
Install ONE `tracing` subscriber in both build profiles via
`otel::init_tracing()` (previously release-only, so spans were a no-op in
dev). Behaviour is now environment-driven, not build-profile-driven:
- OTLP span export happens only when `OTLP_OTLS_ENDPOINT` is set
(release / staging). Unset -> spans are still created with valid
contexts (so outgoing `traceparent` injection keeps working) but export
nowhere; the console `fmt` layer is what shows them.
- `tracing_subscriber::registry()` + `EnvFilter` (RUST_LOG) +
`OpenTelemetryLayer` + console `fmt` layer, installed in both builds.
- Set the global W3C `TraceContextPropagator`: required by the
`tracing-actix-web` request middleware (#139) and by the outgoing
traceparent helpers, both of which read the *global* propagator.
- `tracing-log` bridge stays OFF (`default-features = false`) so the console
fmt layer prints tracing spans only; `log` records keep their existing
path (env_logger in debug, OTel logs in release) without double-printing.
Deps: + tracing, tracing-subscriber (env-filter/fmt/ansi), tracing-opentelemetry
0.32 (pins opentelemetry 0.31 + otel_sdk 0.31, no version bump); opentelemetry_sdk
gains the `testing` feature.
Add `tests/otel_propagation.rs`: the regression matrix from spike #133, pinning
the invariant the whole migration rests on -- an OTel context does NOT cross a
bare `tokio::spawn` on a multi-thread runtime (S2/S4 orphan onto a fresh trace)
but DOES with an explicit parent carry across the spawn (S6 `.instrument()`,
S7 `span.enter()`). This is why every spawn in the codebase must carry the parent.
clippy --all-targets clean; 690 lib + 775 integration + regression + 4 doc-tests pass.
`dev/e2e/e2e.sh up` runs an isolated ImageApi (port 8090, own build dir,
db, thumbnails, HLS) next to a real local server, serving a copy of a
synthetic fixture library. Every fixture image has its path, date and
scenario burned into the pixels; manifest.json records expected dates,
GPS, cameras, tags and counts. `reset` restores the baseline.
- LOCAL_BIND_URL makes the hardcoded localhost:8088 listener
configurable (default unchanged; empty disables it) so a second
instance can start.
- create_user bin: the server has no registration route; idempotent.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The legacy SSE streaming path (chat_turn_stream -> run_streaming_turn ->
run_bootstrap/continuation_streaming) built its LLM spans from
Context::current(), which is always the empty root context here: the codebase
threads OTel contexts explicitly and never attaches one, there is no
context-aware tokio layer, and the turn runs on a tokio::spawn. So every
llm.request span on that path was an orphaned root span, uncorrelated with the
HTTP request.
Thread the handler's extracted request context down through
chat_turn_stream -> chat_turn_stream_inner -> run_streaming_turn ->
run_bootstrap_streaming / run_continuation_streaming, and use it for the
describe_image and agentic-loop calls. Mirrors the non-streaming path, which
already threads parent_cx -> loop_cx.
Also rename the block-scoped db 'cx' in run_streaming_turn to db_cx so it no
longer shadows the new parameter.
Addresses the P2 refactoring follow-ups parked on issue #130:
- otel::with_traceparent(builder, &SpanContext) — one shared W3C
traceparent injector. Replaces the 4-line inline header loop in
llamacpp (3x) and openrouter (3x) and removes ollama's private
inject_traceparent method (4 call sites now use the shared helper).
Takes &SpanContext (not &dyn Span) because the Span trait is not dyn
compatible in opentelemetry 0.31.
- otel::record_http_failure(span, status, message) and
otel::set_http_status(span, status) — collapse the repeated
'set http.status_code attribute + set_status(Status::error)'
boilerplate across all three clients (~10 sites).
Net -45 lines. The remaining if-let-Some(span.as_mut()) guards (token
attributes, parse-failure status) stay inline rather than growing a
SpanHandle wrapper type for a pattern that's already readable.
Add OpenTelemetry tracing to every LLM client call so an insight/chat
turn is a single trace from HTTP entry to each downstream inference.
- LlmClient trait: thread a &opentelemetry::Context through all 5
methods (generate, chat_with_tools, chat_with_tools_stream,
generate_embeddings, describe_image), matching the DAO convention of
explicit context threading rather than ambient Context::current().
- otel::start_llm_request_span: single shared helper that every
provider (openrouter / llamacpp / ollama) funnels through, so the
span shape is identical: name llm.request, SpanKind::Client,
llm.provider / llm.operation / llm.model.
- Per-method spans in all three clients with the spec's operation enum
(chat | chat_stream | embeddings | describe_image | generate); stream
spans are owned and moved into the async_stream generator so they end
when the response drains, not when headers arrive.
- llm.tokens.input / llm.tokens.output recorded on non-stream and
stream completion; llm.cost_usd from usage.cost (OpenRouter);
http.status_code + error status on failure.
- W3C traceparent injected on outgoing LLM HTTP requests (llama-swap,
Ollama, OpenRouter) gated on span_context.is_valid() so debug
no-op-tracer builds don't send an all-zero parent.
- Turn-level spans (ai.chat.turn.execute, ai.persona_chat.turn.execute)
now carry llm.backend + llm.model; with_entry streaming paths thread
the turn context (turn_cx) to child describe_image / agentic-loop
calls instead of the ambient context.
clippy clean; 690 lib + 775 integration + 4 doc tests green.
Records the config boundary the #127 owner-default columns establish:
.env = boot-time deployment config + secrets (never DB), user_ai_prefs
single row = per-request owner defaults (hot-tunable, no secrets),
resolution request param -> owner default -> hard default, and the
safe-by-default privacy posture for default_backend. Adds the
Configuration glossary section to CONTEXT.md (owner default,
deployment config, hard default).
Closes#127.
Grows user_ai_prefs with five nullable owner-default columns and makes
them the server-side fallback layer: request param -> stored pref ->
hard default, at insight generation (agentic + standard), all three
insight-chat turn variants, and reel creation.
- PUT /prefs accepts the fields with the existing three-state partial
update semantics (TriState generalized to TriState<T> for the numeric
reel_max_segments); validation (canonical BackendKind::parse,
MemoriesSpan::from_str) runs before any write.
- GET /prefs returns the new fields.
- capture_prefs reads the existing row and carries the AI owner-defaults
through unchanged (the upsert overwrites all columns), mirroring only
the effective reel span/segments.
- MemoriesSpan gains Display + FromStr so stored spans round-trip
losslessly.
1463/0 tests (+27), clippy clean.
- GET /prefs (JWT): current row or empty {voice, library, display_tz,
updated_at} shape — snake_case, 200 with nulls when no row
- PUT /prefs (JWT): three-state partial update (omitted=unchanged,
explicit null=clear, value=set) via hand-rolled TriState deserializer —
serde derive conflates omitted with explicit null on Option<Option<T>>
- display_tz validated against chrono-tz before any write; invalid → 400,
nothing written. tz_offset_minutes (frozen legacy) preserved verbatim
- GET /timezones (public): chrono_tz::TZ_VARIANTS — exactly the domain
Tz::from_str accepts, so picker list and validation can't drift
- No migration; existing columns only. capture_prefs (POST /reels) untouched
- 14 tests: 3 GET /prefs, 7 PUT /prefs (incl. auth-gate), 2 /timezones,
2 pure merge_patch. Full suite 1436 passed / 0 failed
A container whose /etc/localtime is a copy rather than a symlink makes
server_zone() return None; the assumed_server rung then fell back to
Local::now()'s offset, which is only correct for captures from the
current season. Historical winter walls on a DST host skewed date_utc
by an hour. Resolve the process-local zone at the wall instead
(earliest reading for ambiguous walls).
Surfaced by test-server validation of #119.
- New src/date_view.rs: pure read-side functions (row_true_instant,
row_display_wall, row_display_day, filename_true_instant) applying the
per-source convention table for unconverted rows and the new-contract
triple for converted rows (ADR-0001).
- /memories: grouping on the row's true instant rendered in the owner's
display zone (prefs -> app default), not the client device offset.
SQL is a coarse interval pre-filter over the full years-back window;
exact month-day/week/month matching across past years happens in Rust
(memories::day_in_span, sqlite_w_week).
- Reels: ReelSelector::Memories carries an IANA display_tz instead of a
fixed minute offset; pre-gen params read REEL_PREGEN_DISPLAY_TZ; the
tz_offset_minutes ledger column stores the zone offset at render time.
- Insights: prompt-facing dates render as the display wall; the
proximity timestamp and chat context block use the true instant;
InsightGenerator reads the owner's display zone from prefs per call.
- GpsPhotoSummary carries the new-contract triple alongside the frozen
legacy date_taken.
Closes#119
Review follow-up: rows that exist but can't be faithfully resolved spent
the cap and were re-collected first every tick. Carry a per-library
cursor across ticks (wrapping at end of table), share the cap parser
between the two date drains, and name the conversion tuple.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Per-tick drain (backfill_utc_dates) at the existing date-drain seam,
inside the per-library online gate. Selects date_utc IS NULL AND
date_taken IS NOT NULL (new partial index idx_image_exif_utc_backfill),
re-runs resolve_dates_batch with empty priors (one exiftool subprocess
per batch, same call shape as the #117 audit), and writes only the
new-contract triple; the legacy pair stays frozen. Capped by
DATE_BACKFILL_MAX_PER_TICK; missing-file rows are paged past without
spending the cap. Legacy manual overrides convert via
manual_date_resolution rather than being re-resolved from the file.
Day-boundary invalidation deletes the day-span precomputed reels
covering a re-dated row's old/new display-zone month-day so the nightly
pre-gen regenerates them. Progress: imageserver_date_backfill_remaining
gauge + date_backfill_remaining on GET /libraries.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The spec-mirroring review noted the report showed the offset SOURCE
but not the offset value — the value is what the operator spot-checks.
Each proposed line now ends with offset={+N}m (or - for utc_direct
rows). Tests pin the rendered values.
The filename date class is now first-class (ADR-0001):
- memories::extract_date_from_filename returns FilenameDate:
Wall(NaiveDateTime) for the screenshot/dash/compact patterns,
Utc(DateTime<Utc>) for the unix-timestamp patterns. No patterns
added or removed; every existing pattern carries its convention.
- Waterfall inversion in both resolve_date_taken and
resolve_dates_batch: an in-class name is the original date of
record and resolves BEFORE EXIF / container dates are consulted
(shared filename_class_resolved step; in-class files skip
exiftool entirely). Wall patterns run the offset cascade over the
kamadak prior's evidence (empty evidence -> server-zone
assumption, so a class file always resolves); timestamp patterns
are true instants (tz_source utc_direct, no offset).
- Legacy date_taken stays byte-identical: wall-as-UTC for wall
patterns, epoch for timestamp patterns, via
FilenameDate::legacy_datetime / legacy_timestamp at the seven
consumer call sites.
- Out-of-class files keep the global EXIF-wins waterfall unchanged.
- CLAUDE.md waterfall section rewritten (step 0 = filename class;
the EXIF-beats-filename note becomes out-of-class-only).
Tests: five new waterfall-seam tests (wall no-evidence ->
assumed_server; wall outranks EXIF with offset-tag evidence;
wall GPS evidence; timestamp utc_direct; in-class video name
resolves without exiftool) plus enum-shape assertions in every
extractor test. Code-reviewed on both axes (standards: no
violations, 3 of 4 P2 notes applied; spec: all acceptance
criteria verified, no scope creep).
716 integration + 639 lib tests pass; fmt + clippy clean.
The wayfinding doc pointed at a .../dependencies/blocked_by subpath
that 404s, and the working call needs the blocker's owner+repo in the
JSON body (omitting them 404s with 'repository does not exist').
Verified against Gitea 1.27: POST/DELETE .../issues/<child>/dependencies
with {"index", "owner", "repo"}.
Neither migration had shipped, so the #115 snapshot columns join the
#114 new-contract columns in 2026-09-24-000000_add_true_utc_dates.
Pure ADD COLUMN either way — population is runtime (drains), so nothing
needs re-migrating. Column order is unchanged, so schema.rs stands.
The exiftool branch of the date waterfall now pulls raw strings with
group prefixes (one `exiftool -j -q -G1` subprocess per batch, no
`-d %s`) and classifies each candidate:
- zoned strings (own offset / Z) are true instants;
- naive strings from container groups (QuickTime/Track*/Apple) are
UTC-rendered creation_time fields -> true instants (utc_direct).
Running them through the camera wall-clock cascade was the
"videos off by 4-5 hours" bug: it reinterpreted a UTC instant in
the server zone;
- naive strings from photo-EXIF groups are camera wall clocks and run
the offset cascade (OffsetTime* pairing + GPS evidence pulled in
the same exiftool pass).
The legacy date_taken column stays byte-identical to the old
server-local interpretation (reproduced in Rust, DST-aware); the
new-contract date_utc / camera_offset_minutes / date_taken_tz_source
columns carry the true instant.
Manual date edit (POST /image/exif/date) reinterprets the
naive-as-UTC epoch the client sent as a wall clock in the user's
display zone (camera_tz::manual_date_resolution, tz_source =
'manual'), snapshots the pre-override new-contract triple next to the
existing legacy snapshot pair (3 new columns, migration
2026-09-25-000000), and revert restores both pairs.
ADR-0001 records the container-date finding; CLAUDE.md date-pipeline
section updated.
The example referenced an unimported DbError whose type didn't even
match the closure's anyhow::Error, and the classifier body returned
(). Rewritten as a self-contained io::Error example with an assertion.
Populate the new-contract date columns at ingest while keeping the
legacy date_taken column byte-identical (ADR-0001):
- camera_tz module: offset cascade (offset tag -> GPS zone -> server
zone) as a pure, testable function; bundled offline TZF geometry for
GPS -> IANA resolution; DST-correct offsets for the capture date;
display-zone helpers (DEFAULT_DISPLAY_TZ, display_zone_for,
display_zone_offset_minutes) for the read-side cutover.
- EXIF branch: kamadak-exif now collects OffsetTime* tags paired with
the winning date tag; resolve_date_taken takes an ExifPrior and
emits (date_utc, camera_offset_minutes, date_taken_tz_source) per
branch: exif -> cascade, exiftool/fs_time -> utc_direct, filename
-> unclassified (pending #116).
- Schema: migration adds image_exif.date_utc /
camera_offset_minutes / date_taken_tz_source and
user_ai_prefs.display_tz (all nullable; down.sql drops them).
- DAO + ingest: backfill_date_taken persists the triple alongside the
legacy pair; watcher, upload, and set_image_gps call sites feed the
cascade.
- Response surface: ExifMetadata and ExifSummary carry the triple so
/image/metadata and /photos/exif expose it (null for unconverted
rows); reel requests mirror display_tz into prefs.
cargo build + clippy clean; 625 lib + 702 bin tests pass (the one
failing doctest in utils.rs is pre-existing at the base commit).
- CONTEXT.md: date/time vocabulary (true instant, wall clock, camera
offset, display zone, filename date class, ...)
- ADR-0001: dates are true instants; wall clocks are a display concern
- un-ignore docs/adr/ so decisions land in git
- 38 skills from mattpocock/skills into .agents/skills/ (symlinked into
.claude/skills/ for Claude Code)
- skills-lock.json for reproducible installs
- docs/agents/: issue-tracker (Gitea via tea CLI), triage-labels
(default five-role vocabulary), domain docs (single-context)
- CLAUDE.md: add '## Agent skills' section pointing at docs/agents/
- .gitignore: un-ignore docs/agents/ under the local /docs/* rule
sqlite_stat1 was last gathered by a migration while image_exif had 402
rows and an all-NULL content_hash, so the planner treated the hash index
as non-selective and scanned it for every row in the back-ref refresh's
correlated subqueries. The face_detections pass took ~20s per watcher
tick while holding the write lock, so chat/persona-chat persistence blew
past busy_timeout and returned 500s. With fresh stats the three
refreshes drop from ~22s to ~0.1s.
- library_maintenance: add refresh_planner_stats (plain ANALYZE;
PRAGMA optimize doesn't catch this on SQLite 3.45), run on full-scan
ticks ahead of reconcile / back-ref refresh.
- utils: retry backoff used 1_u32.pow(..), a flat ~100ms; make it the
documented exponential 100/200/400ms.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
OpenRouter reserves credit against the requested max_tokens, falling
back to the model's full output window when omitted, so expensive
models failed with credit-limit errors even for short replies. Default
the cap to 16384; OPENROUTER_MAX_TOKENS overrides it and 0 disables it.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Transcript analysis (359 insights / ~3.3k tool results) showed 31
"database is locked" errors from knowledge-memory tools and 50/359
runs (14%) exhausting the 6-iteration budget with no final answer.
The exhaustion nudge re-invoked chat with an EMPTY tool list, so a
model that still needed information could not call anything.
- utils: add retry_with_backoff_if — same exponential backoff + jitter
as retry_with_backoff, but retries only while the predicate classifies
the error as transient; deterministic failures short-circuit.
- insight_generator: wrap the four knowledge write tools
(store_fact/upsert_fact, store_entity/upsert_entity, update_fact,
supersede_fact) plus the store_fact photo-link upsert in
retry_with_backoff_if gated on a SQLITE_BUSY detector ("database is
locked"/"database is busy" massage in DbError.source). WAL +
busy_timeout absorb most contention; a parallel insight run or the
face-watch write storm still surfaces it, and a short backoff retry
clears it instead of surfacing a hard error to the model.
- insight_generator: exhaustion nudge now re-offers the full tool set
instead of vec![] and explicitly says the model may call more tools;
if it does take one, results are collected and a bounded tool-less
turn forces the actual answer so we never store an empty insight.
Same treatment for the read-only tool loop.
- models/knowledge_dao: derive Clone on InsertEntity, InsertEntityFact,
InsertEntityPhotoLink and FactPatch so retried FnMut closures can
re-issue the same write value on each attempt.
There is no FK between personas and persona_chat_conversations, and the
chat list skips conversations whose persona is gone — so deleting a persona
left its transcripts in the database, invisible and unreachable, forever.
Both deletes now run in one transaction so the two tables cannot get out of
step.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Persona chat stored a flat Vec<ChatMessage> keyed on (user_id, persona_id),
which meant one rolling transcript per persona and no way to revisit a turn.
This moves it onto the same ChatHistoryStore tree the file chat uses and
gives conversations their own identity.
Storage
- messages_json now holds a serialized ChatHistoryStore. Reads accept the
old flat array and upgrade it in place, so existing transcripts survive
without a data migration. The upgrade drops the v1 seed greeting, which
the flat renderer hid but the tree renderer would surface as a bubble the
user has never seen.
- New migration re-keys persona_chat_conversations on an opaque
conversation_id and adds title + created_at, so one persona can hold any
number of separate threads. Every DAO read and write is scoped by user_id
as well: a conversation id is a bearer token for someone's transcript and
must never grant access on its own.
- The per-conversation lock and in-flight turn slot key on conversation_id,
so two threads with the same persona can run turns concurrently.
Endpoints
- POST/DELETE /persona_chat/conversations — start and remove a thread,
replacing /persona_chat/reset.
- GET /persona_chat/conversations — the chat list, with snippet and counts
derived from each tree's active branch.
- POST /persona_chat/rewind, POST /persona_chat/switch-branch,
GET /persona_chat/branches — rewind and fork, mirroring the file chat.
Index 0 is rewindable here (it is the user's own first question, not a
synthetic prompt) and re-anchors on the seed node.
- history/turn/rewind/switch-branch/branches all key on conversation_id;
history gained branch_id and now returns real fork_info, active_leaf_id
and viewing_branch_id instead of placeholders.
The turn body no longer carries a persona at all — it is read from the
stored conversation, so a stale client cannot swap a thread's voice midway.
Titles
After the first turn persists, the conversation is named from its opening
exchange on the same backend the turn ran on. Small models wrap titles in
quotes, prefix them with "Title:" and append explanations, so sanitize_title
strips all of that and truncates on a character boundary. Any failure falls
back to the user's opening question. Generation runs after persistence: a
failed title must not cost the turn.
Fixes found along the way
- insight_chat: both file-chat turn paths captured path.len() before
apply_context_budget drained messages out of the middle, then sliced
messages[path_len..] for the new tree nodes. Once truncation fired that
dropped the user turn from the tree or panicked on an out-of-range start
index. Now read after the budget pass as history_len.
- Persona chat had no context budget at all and hardcoded truncated: false
in the done frame, so a rolling transcript grew unbounded.
- A cancelled turn persisted a half-finished transcript and pushed a second
terminal frame; it now returns early like the file chat.
- The seeded system prompt was frozen at conversation creation, so editing a
persona never reached a thread already in flight. Re-resolved per turn.
- turn_count was overwritten each write with the per-turn message delta;
it is now the cumulative assistant-turn count on the active branch.
- is_initial is always false: the file chat reserves it for its synthetic
"describe this photo" prompt, and marking a persona chat's first question
with it made the opening reply impossible to regenerate.
600 lib tests pass, clippy --all-targets clean.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
The mobile client dispatches POST /persona_chat/turn with snake_case
keys (persona_id, user_message, num_ctx, ...) per the file-chat
convention, but the persona request/response structs carried camelCase
serde renames (personaId, userMessage, ...), so every dispatch 400'd
with 'missing field personaId'. Drop the renames from
PersonaChatTurnRequest, PersonaChatHistoryView, RenderedPersonaMessage,
and PersonaChatResetRequest — the persona wire shapes now match the
rest of the API (history query, 202 turn_id, SSE skip_before) — and
pin the contract with serialization round-trip tests.
- PersonaChatSession dispatches turns through the shared agent loop,
persisting transcripts keyed on (user_id, persona_id) in the new
persona_chat table (migration included).
- GET /persona_chat/history returns a rendered transcript (tool
invocations folded, is_initial flag) matching the file-chat shape.
- POST /persona_chat/turn returns 202 with a turn_id; SSE replay and
cancel reuse turn_replay_impl/cancel_turn_impl, extracted from the
actix-attributed handlers so both route families share the logic.
- POST /persona_chat/reset clears the persona transcript.
- Concurrent dispatches for the same (user, persona) are rejected with
409 via an in-flight gate (InFlightPersonaTurns) whose RAII guard
drops with the spawned turn task, freeing the slot on completion,
error, or abort.
HEIC/HEIF sources use Display P3 color primaries. Without
colorspace=bt709 the mjpeg encoder treated P3 values as sRGB,
producing warm/oversaturated output. Also bake EXIF Orientation
tag into pixels so saved JPEGs are canonically oriented.
- Extract orientation from exif-reader and pass through all
ffmpeg thumbnail paths (small, large, xlarge previews)
- Add shared build_image_thumb_filter() for the 200px path
- Add rotation + colorspace=bt709 to large/xlarge ffmpeg paths
Changed last_fork.clone() to last_fork.take() in render_tree_path
for both assistant and user branches. This prevents fork_info from
propagating to every downstream message, ensuring the chip appears
only at the actual divergence point in the conversation tree.
Rewind & Regenerate resends the identical question, so both branches'
first child matched and every picker option read the same. Snippets now
walk the branches' visible messages (tool scaffolding skipped) in
lockstep and preview the first position where the contents diverge; a
branch that runs out beforehand falls back to its own last message.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
ForkInfo now carries the divergence node's id, and the branches endpoint
accepts node_id + viewing_branch_id to return only the position-ranked
sibling branches at that fork (snippets taken from after the divergence,
skipping tool scaffolding) instead of every leaf in the tree. Options in
the same subtree as the viewing leaf anchor to that leaf so clients can
reliably identify "the branch I'm on". Tree-wide listing is unchanged
when node_id is absent.
- llm_client: descendant_leaves + branch_options_at helpers; optional
position rank on BranchLeafInfo.
- insight_chat: ForkInfo.node_id set during render_tree_path; get_branches
takes the scoping params.
- handlers: dedicated ChatBranchesQuery; unknown node_id maps to 400.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Store chat history as a tree in training_messages instead of a flat
array. Rewind now sets active_leaf_id to the target node rather than
truncating, so discarded paths survive as alternate branches. Fork
indicators ("X/Y") mark divergence points and let the client load or
switch to alternate paths.
- llm_client: StoredChatNode/ChatHistoryStore with tree traversal
helpers (path_to_leaf, children_of, fork_at_node, leaves*, etc.) and
from_flat_array for backward-compatible reads of the old flat format.
- insight_chat: load_history/chat_turn/rewind_history operate on the
tree; new switch_branch and get_branches. render_tree_path walks every
node (including non-rendered tool-dispatch nodes) when computing fork
info, so a fork whose diverging child is a tool call still surfaces on
the following rendered message.
- handlers: GET /insights/chat/branches, POST /insights/chat/switch-branch,
and a branch_id param on the history endpoint.
Backward-compatible: flat arrays are converted to a tree lazily on read.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Cameron Cordes
cameron
