* fix: preserve live anchor run identity
* Validate envelope run ids before snapshot cursor use
* docs(changelog): stamp #6201 stable Anchor run identity
---------
Co-authored-by: Frank Song <franksong2702@gmail.com>
Co-authored-by: nesquena-hermes <agent@nesquena-hermes>
* fix(webui): keep the content search from evicting the user's working set
/api/sessions/search?content=1 walks EVERY session and pulls each one through
get_session(), which inserts it into the SESSIONS LRU and marks it
recently-used. On any install with more sessions than sessions_cache_max
(default 300), a single search therefore flushes the whole cache and refills it
with sessions the user is not looking at — the classic buffer-pool
scan-pollution problem. The sessions actually open in the UI are exactly the
ones evicted, and the search is keystroke-debounced, so it repeats while typing.
A scan reads each session exactly once, so nothing it touches has earned
"recently used". get_session_for_scan() reuses a resident session without
promoting it, and reads a cold one straight from disk without caching it. It
returns None rather than raising, since a scan skips what it cannot open.
This is a correctness fix for cache behaviour, not a latency fix. The
multi-second searches that led here were contention, not scan cost: a trivial
/api/profiles took 9.2s in the same window, and a full read+parse of ~1700 real
sessions measures ~4s total.
test_sessions_search_depth_validation patched api.routes.get_session. With the
search reading through the scan accessor it now patches get_session_for_scan —
left unfixed, two of its cases fail and the third passes vacuously against an
empty result set.
Validation:
pytest tests/test_issue4765_sessions_lru_eviction.py
tests/test_sessions_search_depth_validation.py -> 13 passed
Both added eviction tests fail on the pre-fix accessor (verified by revert):
the working set drops from 4/4 to 0/4 resident after one scan.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
* docs(changelog): stamp #6084 content-search working-set preservation
---------
Co-authored-by: ai-ag2026 <261867348+ai-ag2026@users.noreply.github.com>
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
Co-authored-by: nesquena-hermes <agent@nesquena-hermes>
* feat(terminal): broadcast output to every viewer instead of one shared queue
TerminalSession.output was a single queue.Queue read destructively by the SSE
handler. Two tabs/windows viewing the SAME session each open their own
EventSource, so two _handle_terminal_output handlers competed on that one queue:
every PTY chunk was delivered to exactly one of them. Each tab saw a disjoint
half of the byte stream, and only one ever received terminal_closed.
Output now fans out, mirroring StreamChannel/SessionChannel: each SSE consumer
subscribe()s its own queue (seeded with a bounded backlog so a first/late attach
still replays the recent scrollback, preserving the old buffer-until-first-
consumer behaviour), and put_output broadcasts to all subscribers. A slow
viewer's queue drops its own oldest chunk (drop-oldest, isolated per subscriber)
so one lagging tab can't starve another. The handler unsubscribes in a finally
so the subscriber list can't grow.
Stacked on the terminal fd-leak fix (same file).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
* fix: cover terminal broadcast lifecycle
* fix: serialize terminal subscriber fanout
* test: cover terminal unsubscribe publication race
* restore timing-flaky pytest.skip on test_terminal_survives_short_lived_request_thread (keep API-updated body); changelog #5836
---------
Co-authored-by: ai-ag2026 <261867348+ai-ag2026@users.noreply.github.com>
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
Co-authored-by: nesquena-hermes <agent@nesquena-hermes>
* fix: catch unhandled exception in POST /api/updates/check (defensive hardening) (#6180)
* fix: generate non-empty approval_id when gateway approval.request omits it (#6008) (#6168)
* chore: mark update-check try/except as defensive-only guard, drop #6086 linkage
Per maintainer review, the try/except wrapper is defense-in-depth only —
it does NOT fix#6086 (root cause is signal/process-group reaping).
Updated log message and added inline comment to make this explicit.
Leave #6086 open.
* test: isolate state-dir probes from user state
* docs(changelog): stamp #6168 approval_id, #6180 update-check guard, #6305 test isolation
---------
Co-authored-by: webtecnica <75556242+webtecnica@users.noreply.github.com>
Co-authored-by: webtecnica <webtecnica@users.noreply.github.com>
Co-authored-by: pxxD1998 <214340659+pxxD1998@users.noreply.github.com>
Co-authored-by: nesquena-hermes <agent@nesquena-hermes>
Add an opt-in setting to hide Transparent Stream's per-event timestamp chips while keeping the response footer time visible, for users who found the per-event chips noisy. Thanks @rodboev. Closes#6099.
Recover checkpointed core background processes and rebuild PROCESS_SESSION_INDEX on WebUI startup, so an ordinary terminal(background=True, notify_on_complete=True) proc_* completion that outlives a WebUI restart can still wake its original session. Complements #6283 (which covered async_delegation completions). Thanks @allenliang2022.
Route async-delegation completions by the immutable origin_ui_session_id (exact origin tab) and deliver them through a durable claim/complete/release lifecycle so they arrive exactly once, restart-safe, on both the background wakeup and next-turn drain paths. Combines #6185 (@carlotestor) + #6159 (@sysophelper-droid); supersedes #6002/#6225.
Co-authored-by: carlotestor <carlotestor@users.noreply.github.com>
Co-authored-by: sysophelper-droid <sysophelper-droid@users.noreply.github.com>
* perf: optimize large session reconnect by adding file-size threshold to tail optimization (#6241)
When a sidecar JSON file exceeds 500 KB, the display-path tail optimization
now fires even if the message count is within the raw_budget. This prevents
sessions with few messages but large tool outputs (multi-MB JSON) from
forcing a full-scan merge of all messages on reconnect.
Changes:
- Added _sidecar_file_exceeds_threshold() helper
- Added _SIDECAR_BYTE_TAIL_THRESHOLD = 500_000 constant
- Fall-through to truncation in _state_db_since_timestamp_for_limited_display
when the sidecar file exceeds the threshold, regardless of message count
* CHANGELOG: byte-size reconnect tail optimization (#6260)
---------
Co-authored-by: webtecnica <webtecnica@users.noreply.github.com>
Co-authored-by: nesquena-hermes <agent@nesquena-hermes>
* fix: split OIDC allowlist on commas only, preserve scope whitespace-split (#6244)
_normalize_text_list is shared with _normalize_scopes — OAuth scopes
are space-delimited per RFC 6749 §3.3. Created _normalize_allow_values
that splits on commas/newlines only, keeping multi-word group names
like 'Hermes Users' intact.
* fix(oidc): filter blank allow_values list elements + add parser-split test (gate follow-up)
The new comma/newline-only _normalize_allow_values() list-path retained empty
strings that the shared _normalize_text_list() had filtered, so a YAML
allow_values: [""] would brick an OIDC-only deployment (every callback 403s).
Filter stripped-empty collection elements. Adds a regression test asserting
allowlist multi-word preservation, comma/newline splitting, blank filtering,
and that scopes stay space-delimited (RFC 6749 §3.3).
Co-authored-by: webtecnica <webtecnica@users.noreply.github.com>
* CHANGELOG: OIDC allowlist whitespace fix (#6244)
---------
Co-authored-by: webtecnica <webtecnica@users.noreply.github.com>
Co-authored-by: nesquena-hermes <agent@nesquena-hermes>
* fix(reasoning): gate reasoning_effort ladder to GLM-5.2+ on native zai
Z.AI's API (docs.z.ai) defines reasoning_effort as GLM-5.2+ exclusive, but
hemes-webui advertised the full 6-level ladder for all 7 GLM models because
_candidate_supports_reasoning has an unconditional glm token match and
_filter_reasoning_efforts_for_provider had no ZAI branch. Six of seven catalog
models (glm-5.1, glm-5, glm-5-turbo, glm-4.7, glm-4.5, glm-4.5-flash) showed a
selector whose values the endpoint silently ignores, and GLM-4.7 (forced thinking
that cannot be disabled per Z.AI docs) showed a 'none' option with no effect.
Add a ZAI branch to _filter_reasoning_efforts_for_provider mirroring the existing
OpenAI/Gemini/Anthropic ceiling pattern: strip the whole ladder for pre-5.2 GLM
models and for the forced-thinking GLM-4.7 family; preserve the full ladder for
GLM-5.2+ (whose accepted values match VALID_REASONING_EFFORTS exactly). The gate
is scoped to the native zai provider only (aliases glm/z-ai/z.ai/zhipu all
resolve to zai); aggregator providers are untouched because they route through
their own routers, not Z.AI's native endpoint.
The glm family-detection heuristic in _candidate_supports_reasoning is unchanged
— GLM models DO support the thinking on/off toggle at the family level; this fix
is specifically about the reasoning_effort intensity ladder.
State layer: agent.reasoning_effort config + UI dropdown options derived from
resolve_model_reasoning_efforts. Invariant: UI options and coercion now agree
and match Z.AI's per-model docs (max offered only for GLM-5.2+, none never
offered for forced-thinking models). Out of scope: the thinking:{type:...}
request-field translation lives in the external agent/gateway layer.
* fix(reasoning): close ZAI coercion gap + harden test assertions
Address Greptile review on #6219 (round 1):
1. Vacuous test assertion (test_glm_5_2_preserves_none_sentinel): the 'or'
fallback made the assertion always-true, so a regression stripping 'none'
for GLM-5.2 would go undetected. Rewrote to inject 'none' via the raw source
(mocking _resolve_model_reasoning_efforts_impl) and assert it survives — the
test now genuinely exercises the preservation branch.
2. Coercion gap for non-max stored levels on pre-5.2 GLM: the existing
'if ceiling and raw not in ceiling' guard treats an empty ceiling as 'no
rule' (preserving the configured effort verbatim per #3505), so a stored
'high'/'medium'/'low' for glm-5.1/glm-4.5/glm-4.7 on native zai was forwarded
to Z.AI unchanged and silently ignored — contradicting the PR's stated
UI/coercion agreement invariant.
Root cause: the ZAI gate returns [] to mean 'known-empty' (no
reasoning_effort at all), but the coercion path treated all [] as
'ambiguous/unknown, preserve verbatim'. Fixed by extracting the ZAI decision
into _zai_glm_reasoning_efforts_supported (True/False/None sentinel) shared by
both the filter and coercion, then special-casing the known-False result in
coerce_reasoning_effort_for_model to return '' (send no field). The #3505
preserve-verbatim behavior for genuinely-unknown models on non-zai providers
is unchanged.
Added 10 regression tests (all fail before the coercion fix, pass after):
- All 6 levels (max..minimal) coerce to '' for each pre-5.2 GLM + glm-4.7
- All 4 aliases (glm/z-ai/z.ai/zhipu) resolve through the same coercion gate
- GLM-5.2 preserves all 6 levels verbatim
- Regression guard: unknown model on custom: provider STILL preserves verbatim
State layer: agent.reasoning_effort config + the value forwarded to Z.AI.
Invariant now fully holds: UI offers no options for pre-5.2 GLM AND coercion
sends no reasoning_effort field for any stored level on those models.
* fix(reasoning): preserve ZAI GLM 4.5-5.1 thinking toggle when effort ladder empty
Address nesquena-hermes round-2 review on #6219: returning [] for the effort
ladder on sub-5.2 GLM models hid the entire reasoning chip in the composer
(static/ui.js:4932 treats empty supported_efforts as 'no reasoning control at
all'), silently regressing the working thinking on/off toggle for GLM-4.5/4.6/
5.0/5.1 users. Per Z.AI's own docs, those models accept the thinking
{type:enabled|disabled} toggle even though they do not accept the
reasoning_effort intensity ladder.
Fix decouples thinking-toggle capability from the effort ladder:
Backend (api/config.py):
- Refactor _zai_glm_classification returns one of 'effort' (GLM-5.2+), 'thinking'
(GLM-4.5 up to but not including 5.2), 'forced' (GLM-4.7 family), or None
(non-zai / non-GLM). Single source of truth shared by all three consumers.
- _zai_glm_reasoning_efforts_supported now wraps classification for the coercion
contract (unchanged behavior).
- _zai_glm_thinking_toggle_supported returns True for 'effort' or 'thinking',
False for 'forced', None otherwise.
- get_reasoning_status gains a supports_thinking_toggle field = bool(supported)
OR (zai_thinking is True). Non-zai providers default to bool(supported_efforts)
so their chip-visibility behavior is unchanged.
Frontend (static/ui.js):
- New _currentReasoningToggleSupported state var (default undefined = treat as
true so legacy responses without the field do not newly hide the chip).
- _applyReasoningChip shows the chip when hasEffortLadder OR toggleSupported.
Empty efforts + toggle=True keeps the chip visible with just the None/On
control (the existing _applyReasoningOptions already shows 'none' when the
ladder is empty). Empty efforts + toggle=False (GLM-4.7 forced) hides it.
- Profile-transition and fetch-failure resets now pass
supports_thinking_toggle:false alongside the empty efforts so the chip hides
during the unknown-state window, matching the prior reset contract.
Tests (30 new):
- _zai_glm_classification parametrized across all three tiers + aliases + defer
- get_reasoning_status supports_thinking_toggle per tier (GLM-5.2 both, GLM-4.6
toggle-only, GLM-4.7 neither, non-zai defaults to effort capability)
- Frontend _applyReasoningChip behavior via node driver: empty efforts +
toggle=True stays visible, toggle=False hides, effort ladder alone is
sufficient, absent field keeps prior behavior
State layer: agent.reasoning_effort config + supports_thinking_toggle field in
/api/reasoning + composer chip visibility. Invariant: the chip is hidden ONLY
when the model supports neither the effort ladder nor the thinking toggle
(GLM-4.7 forced, or genuinely non-reasoning models); GLM-4.5-5.1 retain the
working On/None control they had before the round-1 effort gate.
* fix(reasoning): make ZAI thinking toggle two-way + force GLM-4.7 stored none
Address nesquena-hermes round-3 review on #6219 — two SILENT gaps in the
thinking-toggle path, plus a click-handler sibling I found while auditing.
Gap #1 — ONE-WAY toggle for GLM-4.5/4.6/5.0/5.1 (api/config.py:4247,
static/ui.js:4902, static/index.html:757):
The round-2 fix kept the chip visible for thinking-tier models but the only
rendered dropdown option was 'None' (the HTML had no Default option, and
set_reasoning_effort rejected empty effort with 400). So a GLM-4.6 user could
turn thinking OFF but never back ON — worse than the original bug.
Fix:
- set_reasoning_effort now accepts empty effort as 'clear the override' (removes
agent.reasoning_effort so the provider default takes effect). Invalid values
still raise ValueError.
- static/index.html gains a <div data-effort=''>Default</div> option.
- _applyReasoningOptions always shows both Default ('') and None alongside the
effort ladder, so a thinking-tier model (empty ladder + toggle=true) renders
an operable Default+None two-state control.
- Click handler (ui.js:5106) checks option presence (if(opt)) not truthiness
(if(effort)) — the old check silently ignored data-effort='' clicks, which
would have left the Default button dead even after the HTML/backend changes.
Gap #2 — GLM-4.7 not forced when 'none' stored (api/config.py:3984, :3857):
When GLM-4.7 had agent.reasoning_effort=none configured, coercion preserved
'none' via the early return at line 3985, so streaming built disabled reasoning
for a model that forces thinking on regardless. Separately, when the raw
capability source listed 'none', resolve_model_reasoning_efforts reattached it
to GLM-4.7's supported_efforts (['none']), leaking an 'off' option to the UI
for a forced-thinking model.
Fix:
- coerce_reasoning_effort_for_model checks _zai_glm_classification == 'forced'
BEFORE the generic 'none' early-return, coercing stored 'none' to '' (default
= thinking on) for forced models.
- resolve_model_reasoning_efforts returns [] early for forced-tier models,
skipping the 'none' reattachment entirely.
Tests (17 new):
- Gap #2: coerce('none', glm-4.7) -> '', regression guard that non-forced GLM
still accepts 'none'; resolve does not reattach 'none' for forced but DOES
for thinking-tier; end-to-end get_reasoning_status for forced+stored-none.
- Gap #1 backend: set('') clears the key (no raise), set('garbage') still
raises, all 7 valid levels still save.
- Gap #1 frontend: three new node-driver tests asserting the dropdown exposes
both Default and None for thinking-tier (two-state), Default+None+ladder for
effort-tier, and the off->on->off round trip keeps both visible throughout.
- Updated test_reasoning_show_hide.test_set_reasoning_effort_rejects_invalid to
reflect the new contract (empty accepted, garbage rejected).
Regression gate: gap#2 coerce tests fail without the forced-tier check (3
failures); gap#1 backend test fails with 'ValueError: effort is required'
without the empty-acceptance change. 219 passed, 1 pre-existing skip across
the full reasoning + chip + config-cache surface.
State layer: agent.reasoning_effort config + supports_thinking_toggle field +
composer dropdown options. Invariant: the thinking toggle is now genuinely
two-way for GLM-4.5-5.1 (Default=on, None=off, both always visible) and
GLM-4.7 forced-thinking never offers 'none' in any path (coerce, resolve,
status, or UI).
* CHANGELOG: GLM per-version reasoning controls (#6219)
---------
Co-authored-by: Ruby Hartono <58564005+rh-id@users.noreply.github.com>
Co-authored-by: nesquena-hermes <agent@nesquena-hermes>
* feat: expose msg_limit ceiling via /api/session metadata, frontend reads dynamically (#6177)
Backend exposes _MAX_MSG_LIMIT as _msg_limit_max in every /api/session
response. Frontend reads it dynamically, falling back to _MSG_LIMIT_MAX
for older servers. This removes the hand-mirrored coupling between the
two layers.
Removed test_msg_limit_ceiling_drift.py since the mirror pattern that
required the drift guard is replaced by dynamic metadata.
This is the standalone metadata-decoupling piece from #6206,
without the clamp/paging that already shipped in exp-v0.52.98 via #6152/#6154.
* fix(session): declare _msgLimitMax at module scope + CHANGELOG + gate fixes (#6214 follow-up)
The submitted PR used _msgLimitMax at two read sites (boundedReloadLimit in
_ensureMessagesLoaded, useBeforePaging in _loadOlderMessages) but never declared
it and read it before assignment -> undefined on cold load -> full-transcript
fetch every load (regression) + implicit global. Declared `let _msgLimitMax =
_MSG_LIMIT_MAX;` at module scope so the reload-width paths always read a defined
value (the static fallback) until the server's _msg_limit_max lands.
Also: defined the ceiling globals in the two inline node-harness tests that copy
_ensureMessagesLoaded's body (test_cross_session_message_load_isolation,
test_session_unread_dot_on_visit), updated the source-string assertion in
test_webui_external_refresh_frontend, and added 3 decoupling tests (backend field
present, module-scope declaration + fallback, both paths read the live ceiling)
replacing the deleted drift-guard.
Gate: Codex adversarial SAFE TO SHIP (executable probes: cold-load fallback,
mixed-version omission, live update, cross-session isolation, over-ceiling bare
refresh, msg_before row preservation). Full sharded suite green.
Co-authored-by: webtecnica <webtecnica@users.noreply.github.com>
---------
Co-authored-by: webtecnica <webtecnica@users.noreply.github.com>
Co-authored-by: nesquena-hermes <agent@nesquena-hermes>
* fix(routes): clamp GET /api/session msg_limit to a server-side ceiling
Memory: ?msg_limit= had no upper bound — a client could request
msg_limit=1000000 (or the frontend's msg_limit=9999 outline-jump path) and
force the server to assemble and serialize an unbounded message payload. The
frontend's real pagination grows windows by ~30 at a time (initial load 30,
load-older +30, msg_before paging 30), so only the outline-jump and
pathological/hostile cases ask for huge values.
Add _MAX_MSG_LIMIT (500) and clamp at the query-parse site
(max(1, min(int(_msg_limit), _MAX_MSG_LIMIT))). The ceiling is generous — far
above any legitimate visible-row window — so real pagination is unaffected. The
existing _messages_truncated signal already covers the clamped case: when the
request exceeds the ceiling, _message_window_for_display returns
_messages_offset > 0 and the client learns more rows exist (load-older still
works). The bare no-msg_limit path is intentionally unchanged — it is the
documented "give me everything" escape hatch used by branch/undo/jump-to-start
flows that need the full transcript for correct global indices.
Test: tests/test_session_msg_limit_ceiling.py — the ceiling constant is
reasonable (100..2000), an over-ceiling request is clamped and signals
truncation, and legit sizes (5/30/60/100) are unaltered. Existing window/tail
tests (19) unchanged.
Contract Routing
- Task type: memory-bound fix (unbounded msg_limit request payload).
- Touched areas: GET /api/session query parsing (api/routes.py).
- Relevant public docs: AGENTS.md, CONTRIBUTING.md, docs/CONTRACTS.md.
- State layer mutated: none (read-only endpoint response shaping).
- Contract change (additive): ?msg_limit=N is now clamped to _MAX_MSG_LIMIT=500.
Compatibility: the only frontend caller above the ceiling is outline.js's
msg_limit=9999, which now receives up to 500 rows + _messages_truncated=true
(load-older still works). All other callers (30/60) are unaffected. The bare
no-msg_limit path is unchanged.
Release note: GET /api/session now caps ?msg_limit at 500 rows server-side,
bounding the worst-case payload for oversized requests.
Model Used: builtin:zai-coding-plan/GLM-5.2 (ZCode agent).
* fix(frontend): route msg_limit-heavy paths around the server ceiling
PR #6152 clamps GET /api/session ?msg_limit= to a max of 500 server-side. Two
frontend paths relied on unbounded msg_limit and silently broke for sessions
> 500 visible rows:
1. outline.js _jumpToMessage sent msg_limit=9999 as a "give me everything" hack
so it could scroll to any message by absolute index (msg-user-<rawIdx>).
Clamped to 500, the target row's DOM id doesn't exist for early messages in
long sessions, and the jump silently no-ops (line 119 `if (r)` is falsy).
Fix: drop msg_limit=9999 — use the bare messages=1 path, which #6152 left
unbounded precisely for callers that need the full transcript. This restores
exact pre-#6152 behavior for outline jumps.
2. sessions.js _loadOlderMessages grows msg_limit by +_INITIAL_MSG_LIMIT each
load (30 -> 60 -> ... -> 500 -> clamped). Past 500 the server returns the
same clamped tail, olderMsgs shrinks to 0, and endless-scroll / "Load
earlier" silently stalls — the head becomes unreachable. Fix: once the grown
requestedLimit meets/exceeds the new _MSG_LIMIT_MAX mirror (500), switch the
primary fetch to msg_before paging (a fixed _INITIAL_MSG_LIMIT backward page
keyed off _oldestIdx) — the same bounded paging the existing race-fallback
uses, so the head stays reachable for arbitrarily long transcripts. The
response is handled by the existing prepend path (tailMatches is naturally
false for a page, so the !tailMatches branch reuses the fetched data).
Added _MSG_LIMIT_MAX = 500 constant in sessions.js mirroring backend
_MAX_MSG_LIMIT, documented as kept-in-sync.
Verification: node --check passes on both files; the backend window-contract
tests (test_session_tail_payload, test_session_message_window_renderable_tail,
19 tests) still pass. No JS test harness exists in this repo (vanilla JS,
manual browser verification per TESTING.md) — manual verification needed: open a
> 500-message session, (a) click an outline entry for an early message and
confirm it scrolls+flashes, (b) scroll up past 500 loaded rows and confirm
"Load earlier" keeps producing older messages without stalling.
Contract Routing
- Task type: frontend follow-up to a backend memory fix (#6152).
- Touched areas: outline jump-to-message (static/outline.js), endless-scroll /
load-older (static/sessions.js _loadOlderMessages).
- Relevant public docs: AGENTS.md, CONTRIBUTING.md, docs/CONTRACTS.md.
- State layer mutated: client-side S.messages (the active-session transcript),
same as the existing load-older path. No backend state change.
- Scope boundaries: does not weaken the #6152 clamp. The bare messages=1 path
(outline) was intentionally left unbounded by #6152; the msg_before paging
path (load-older) is bounded by _INITIAL_MSG_LIMIT and never hits the ceiling.
Release note: fixes outline jump-to-message and endless scroll silently
breaking on sessions longer than 500 messages after the server-side msg_limit
ceiling (companion to #6152).
Model Used: builtin:zai-coding-plan/GLM-5.2 (ZCode agent).
* test(frontend): update static-source assertion for refactored _loadOlderMessages fetch
The static-source test test_session_message_loads_keep_explicit_longer_timeouts
asserted the exact multi-line shape of the _loadOlderMessages fetch strings.
The #6154 refactor wrapped them in a useBeforePaging ternary (tail-growth vs
msg_before paging), reindenting them — the contract the test guards (both
fetches keep timeoutMs:120000 for large state.db loads) is preserved, but the
literal source shape changed, so the assertion failed on shard 0.
Updated the assertions to match the new source shape while keeping the test's
intent: assert each fetch URL + its {timeoutMs:120000} survive in sessions.js.
Model Used: builtin:zai-coding-plan/GLM-5.2 (ZCode agent).
* test(msg-limit): stopgap drift guard for _MSG_LIMIT_MAX === _MAX_MSG_LIMIT
Reviewer guidance (#6154 round-2): the stopgap drift-test belongs in THIS PR
(#6152) because _MAX_MSG_LIMIT is defined here. The frontend _MSG_LIMIT_MAX
mirror lives on #6154 (not master yet), so the assertion SKIPS when the JS
constant is absent and activates automatically once both branches land on master.
The guard: extract _MAX_MSG_LIMIT from api/routes.py and _MSG_LIMIT_MAX from
static/sessions.js via regex; assert equality when both present. If they drift,
load-older silently stalls at the wrong value (the exact regression #6154 fixed).
Retired by #6177 (metadata-exposure), which removes the mirror entirely.
Verified: on this branch the cross-check SKIPS (_MSG_LIMIT_MAX absent, as
expected — #6154 not landed) and the backend-existence test PASSES. Extraction
logic confirmed correct against simulated match (500==500 passes) and drift
(999!=500 fails) cases.
Model Used: builtin:zai-coding-plan/GLM-5.2 (ZCode agent).
* fix(session): prevent silent row-loss in msg_limit ceiling paging (gate follow-up)
Adversarial review of #6152/#6154 reproduced two silent row-loss regressions in
static/sessions.js; both fixed here, plus a stale source-string assertion update
and the CHANGELOG entry:
1. _loadOlderMessages: gate the suffix-continuity heuristic on !useBeforePaging so
a raw-row-heavy msg_before cursor page whose visible text repeats the current
tail can't be misclassified as the cumulative tail and wholesale-replace it
(previously dropped 470 of 940 rows). msg_before pages are always prepended.
2. loadSession same-session refresh: only apply the width-hint msg_limit when it
is <= _MSG_LIMIT_MAX; above the ceiling the backend would clamp and silently
shrink an already-loaded >500-row transcript to the last 500. Over-ceiling
reloads now use the bare full-transcript path (no msg_limit / no expand_renderable).
3. tests/test_webui_external_refresh_frontend.py: update the reloadLimitParam
source assertion to the boundedReloadLimit form.
Re-gate: Codex adversarial SAFE TO SHIP (940/940 rows retained on cursor paging,
1000/1000 on refresh, no seam duplication, small sessions still use the fast tail
window); targeted + sessions/pagination/regression suites green.
Co-authored-by: Ruby Hartono <rh-id@users.noreply.github.com>
* test: fix two node-harness tests broken by the boundedReloadLimit change
- test_issue3162_ensure_messages_loaded: replace the brittle fixed 4500-char
window (which the boundedReloadLimit lines pushed the carry-forward past) with
robust brace-balance function-body extraction.
- test_cross_session_message_load_isolation: define _MSG_LIMIT_MAX=500 in the node
harness env; _ensureMessagesLoaded now references it, and an undefined value made
boundedReloadLimit=null -> the fetch URL dropped msg_limit/expand_renderable and
mismatched the ordered api() harness -> stall/timeout.
---------
Co-authored-by: Ruby Hartono <58564005+rh-id@users.noreply.github.com>
Co-authored-by: nesquena-hermes <agent@nesquena-hermes>
Co-authored-by: Ruby Hartono <rh-id@users.noreply.github.com>
Reviewer regression (reproduced): _STATE_DB_DISPLAY_ROW_BACKSTOP (newest-50k SQL
cap) was applied UNCONDITIONALLY to the GET /api/session display path's state.db
read. But merge_session_messages_append_only needs the rows at/around the
session's truncation_boundary (the preserved prefix) to reconcile correctly. A
newest-N-only cap drops those boundary rows for a >N-row session and corrupts
the merge (silently losing the preserved prefix), and also prevents older-page
(msg_before) requests from ever reaching them. So a pathological-but-real >50k-
row compressed session got a corrupted merge / unreachable older history rather
than a clean bound.
Fix: gate the backstop on the SAME conditions
_state_db_since_timestamp_for_limited_display uses to decide a read is
boundary-free — not msg_before paging, and no truncation_watermark /
truncation_boundary. Those cases stay on the full (uncapped) read; the backstop
is now a defensive net for the common uncompressed initial-tail path only.
Extracted into _state_db_backstop_limit_for_display for direct test coverage.
The get_state_db_session_messages(limit=) signature + newest-rows subquery are
unchanged — only the display-path APPLICATION of the cap is gated.
Test: tests/test_state_db_backstop_boundary_gate.py — backstop applies with no
boundary prefix; SKIPPED when truncation_boundary / truncation_watermark set or
msg_before paging; empty-string markers treated as unset (matching the existing
helper). Existing backstop + reconciliation suites (53 tests) unchanged.
Model Used: builtin:zai-coding-plan/GLM-5.2 (ZCode agent).
Reviewer regression (reproduced): the broadcast drop-oldest loop did
put_nowait -> on Full, get_nowait -> on Empty, break. But Empty here means a
concurrent consumer (the SSE handler thread) DRAINED the queue between our Full
and get_nowait — the queue now has space, which is exactly the condition to
retry the put. `break` silently discarded `item`, and when `item` was a terminal
frame (stream_end/error/cancel) the subscriber never received it, leaving the
client attached indefinitely (spinner-forever). The "# cap 0 defensive guard;
never reached" comment was the flawed assumption: any concurrent drain makes
the Empty branch reachable at any cap.
Fix: on queue.Empty, `continue` (retry the put into the now-empty queue) in
both the broadcast path and the replay path (for consistency; the replay path
runs under self._lock with a fresh queue so it's unreachable in practice, but
the same race-safe rule applies). No infinite-loop risk: each iteration either
succeeds a put (break) or succeeds a get (progress); the continue only fires on
Empty, after which the next put has space.
Test: test_terminal_frame_survives_concurrent_drain_during_drop_oldest
deterministically simulates the interleaving with a custom queue whose first
post-Full get_nowait raises Empty (as if a concurrent consumer drained it),
then runs BOTH the pre-fix `break` logic (drops the terminal frame — proving
the test bites) and the post-fix `continue` logic (delivers it).
Model Used: builtin:zai-coding-plan/GLM-5.2 (ZCode agent).
Codex gate on #6143 found a SILENT regression the reuse-path fix introduced:
_replace_session_db_in_kwargs early-returned the OLD handle when the rebuild
failed, but master assigned None. If the old handle was already CLOSED, both
credential self-heal callers (streaming.py:9032/10253) then built a fresh agent
around a closed SessionDB -> every persist/search fails with 'NoneType has no
attribute execute' while the chat keeps going. Guard on _session_db_is_open:
keep a live handle (subagents hold it by ref), else degrade to None (clean lazy
reinit, master behaviour). +2 regression tests.
Co-authored-by: carlotestor <carlotestor@users.noreply.github.com>
Memory: get_state_db_session_messages had no SQL LIMIT — it full-scanned the
state.db messages table and fetchall()'d into a Python list. The display path
(GET /api/session) already has a careful since_timestamp optimization that
bounds the common uncompressed tail load, but it deliberately bails (returns
None) on compressed sessions (truncation_watermark/boundary) and msg_before
paging — in those cases the read used to full-scan with no cap. A
pathological/huge state.db could then materialize unbounded rows into memory.
Add an opt-in `limit` parameter to get_state_db_session_messages (applied as a
SQL LIMIT that keeps the NEWEST rows via a DESC subquery re-sorted ASC). It is
a BACKSTOP, not a semantic window: the display window counts visible rows
post-reconciliation, so a true window LIMIT here would corrupt the
sidecar/state.db merge (see _state_db_since_timestamp_for_limited_display,
which deliberately does NOT SQL-LIMIT raw rows for exactly that reason).
Thread a generous _STATE_DB_DISPLAY_ROW_BACKSTOP (50000) from the GET /api/session
display caller only. The full-history model-context callers (reconciliation at
models.py:3437, context reconstruction at :8576, new-turn context at
streaming.py:8443) do NOT pass a limit — their semantics require the full
history, unchanged.
Test: tests/test_state_db_read_backstop.py — no-limit returns full history
oldest-first (model-context contract unchanged); limit=N keeps the newest N
re-sorted oldest-first; limit > row count returns all; limit<=0 clamps to 1
(newest); invalid limit falls back to unbounded; limit composes with
since_timestamp. Existing state.db active-filter + reconciliation suites (54
tests) unchanged.
Contract Routing
- Task type: memory-bound fix (unbounded state.db row materialization on the
display path's bail cases).
- Touched areas: state.db message reader (api/models.py) + GET /api/session
display caller (api/routes.py). NOT the model-context callers.
- Relevant public docs: AGENTS.md, CONTRIBUTING.md, docs/CONTRACTS.md,
docs/rfcs/webui-run-state-consistency-contract.md (Model context layer).
- State layer mutated: none (read-only). The model-context read path is
UNCHANGED (no limit passed) — Invariant 1 (visible current turns enter model
context) and the reconciliation contract are preserved. Only the display path
gets the defensive cap, which does not affect what the agent receives.
- Scope boundaries: this is narrower than a naive "add LIMIT everywhere" —
_state_db_since_timestamp_for_limited_display's docstring explains why a
semantic window LIMIT would corrupt the merge; this cap is purely a
pathological-input safety net above any legitimate session size.
Release note: GET /api/session's state.db read now has a defensive row backstop,
capping memory when the bounded since_timestamp optimization bails on
compressed/paged sessions.
Model Used: builtin:zai-coding-plan/GLM-5.2 (ZCode agent).
- Log failed closes in _adopt_session_db_for_cached_agent with
logger.debug(..., exc_info=True) instead of bare pass, matching
_replace_session_db_in_kwargs so a failed close (EMFILE risk) is
diagnosable.
- Drop the fragile exec/source-slice fallback in the test helper import;
real import or pytest.skip. Source-level pins still cover reverts
without importing streaming.
Background subagents (delegate_tool) capture parent_agent._session_db by
reference. The cached-agent reuse path created a fresh SessionDB every
stream request and unconditionally closed the previous handle (PR #1421
EMFILE fix). A server-side wakeup / new turn for the same parent session
could therefore close the shared handle while children were still
flushing messages, producing:
Session DB append_message failed: 'NoneType' object has no attribute 'execute'
Reproduce (observed in production):
1. Parent WebUI session runs delegate_task with N background subagents
2. Parent turn tears down / idle-hook redelivers a deferred wakeup
3. New stream for the parent adopts a fresh SessionDB and closes the old one
4. Live subagents' append_message hits conn=None
Fix: _adopt_session_db_for_cached_agent reuses a still-open handle (and
closes the unused new one — still EMFILE-safe) and only replaces when
the existing handle is missing or already closed. Same guard applied to
_replace_session_db_in_kwargs (credential self-heal). LRU eviction still
closes at true session boundaries.
Tests updated to pin the adopt helper and the subagent-safe semantics.
