* stage #4618 (allenliang2022): broaden streaming stale-compressor guard to any model-window mismatch + #4618 regression tests + CHANGELOG
Broadens #3256's default-only live-usage guard: the streaming SSE snapshot now
always resolves the real per-model window via the same helper GET /api/session
hydration uses (_context_length_lookup_inputs_for_model + get_model_context_length)
and corrects whenever it differs from the compressor's cached value, with a
TypeError fallback to the legacy 2-arg form. Fixes 'refresh shows 1M, send reverts
to stale 168k + early auto-compress' on model-switched sessions. Per-stream cache
preserved (one lookup/stream). Code byte-identical to PR head 3beb18e92d73.
Adds 4 source-structure regression tests (RED-proven on master).
Co-authored-by: allenliang2022 <allenliang2022@users.noreply.github.com>
* fix#4618 gate findings: profile-scoped config (Codex cross-profile) + #4248 256k acceptance gate (Opus downward-clobber)
Codex SHIP-WITH-FIXES: live-snapshot used ambient get_config() which in the
detached streaming worker resolves the process-global/default profile (#3294) ->
for a non-default profile pinning a different per-model context_length it would
surface the WRONG profile's window. Now resolves via get_config_for_profile_home
on the session's own profile home (mirrors the worker's _cfg resolution).
Opus SHIP-WITH-FIXES: broadened guard aligned resolution w/ hydration but not its
#4248 acceptance gate -> a transient low-confidence 256k metadata probe could
clobber a LARGER cached window mid-stream. Now reuses the exact hydration helper
_should_accept_session_context_length_refresh on both modern + legacy paths.
+ regression tests for both. Co-authored-by: allenliang2022 <allenliang2022@users.noreply.github.com>
* fix#4618 Codex re-gate findings: broaden save + SSE-done stale-compressor guards too
Codex re-gate found the broadened live-snapshot guard fixed metering but the two
SIBLING paths still used the old default-only exact-cap test:
- api/streaming.py final session-save: persisted stale other-model window (168k)
to s.context_length -> wrong window on reload.
- api/streaming.py terminal SSE: emitted stale window -> indicator REVERTS
on stream end (messages.js overwrites S.lastUsage) = the exact 'send reverts to
168k' symptom.
Both now resolve the real per-model window via the same hydration helper and honor
the #4248 acceptance gate (no 256k downward-clobber), with legacy 2-arg fallback.
This is the root-cause completion across all 3 paths (live/save/SSE-done).
+ 2 regression tests. Co-authored-by: allenliang2022 <allenliang2022@users.noreply.github.com>
* docs(#4618): note model_changed-omission rationale (Opus) + broaden CHANGELOG to all-3-paths
* Release v0.51.561 — Release TT (context-window indicator stays correct after model switch; #4618)
---------
Co-authored-by: nesquena-hermes <agent@nesquena-hermes>
Co-authored-by: allenliang2022 <allenliang2022@users.noreply.github.com>
Codex regression gate found that _session_model_identity_matches normalized
only the @provider:model form, not provider/model (slash). A session stored as
'deepseek/deepseek-v4-1m' resolving to bare 'deepseek-v4-1m' was treated as a
model change -> the 256k fallback bypassed the accept-guard and clobbered the
persisted 1M window (the same #4248 bug on slash-qualified IDs). Mirror the
slash-aware split already used by _model_matches_configured_default. Adds a
route-level regression + unit test for the slash shape.
Co-authored-by: franksong2702 <franksong2702@users.noreply.github.com>
Resolve custom provider API keys from the matched config snapshot and pass them through session hydration plus streaming fallback context-length probes. This prevents authenticated /v1/models endpoints from falling back to the default 256K window and clobbering larger persisted session metadata.
Prior round stripped provider prefixes from both sides and matched bare-only,
which over-matched: openai/gpt-4o would match default openrouter/gpt-4o. Now the
matcher compares bare model ids AND rejects when both sides identify DIFFERENT
providers (from provider/ prefix, @provider: qualifier, or the explicit provider
arg). Same-provider / unknown-session-provider still match. Added cross-provider
rejection regression tests.
Co-authored-by: allenliang2022 <allenliang2022@users.noreply.github.com>
The default-only context_length guard compared model.default to the session
model with exact string equality. But model.default and the session model can
be stored in equivalent-but-different shapes (bare 'claude-opus-4.8',
provider-prefixed 'anthropic/claude-opus-4.8', or '@anthropic:claude-opus-4.8').
An exact compare wrongly treats the actual default model as non-default and
drops its configured context_length cap for provider-prefixed configs.
Add api/routes._model_matches_configured_default(session_model, cfg_default,
provider) that normalizes all three shapes, and use it at all 6 guard sites
(routes resolver + the 5 api/streaming.py sites: live-usage snapshot, persistence
_skip_cc_cl, persistence fallback _apply_cfg_ctx, SSE-done _dropped_stale_cap_sse,
SSE fallback _apply_cfg_ctx). Imported function-scoped in streaming to avoid the
routes<->streaming module-level circular import. 10 helper unit tests + a
behavioral test that a prefixed default still receives its cap.
Co-authored-by: allenliang2022 <allenliang2022@users.noreply.github.com>
Codex regression gate (+Opus, both independently) found the default-only guard
dropped the stale compressor cap but two sibling paths stayed inconsistent:
1. Per-turn persistence: fallback resolver only ran when context_length was
falsy, so a previously-persisted stale 232K survived forever on non-default
sessions. Now also runs when _skip_cc_cl, and rescales threshold_tokens to
the recomputed real cap (or clears it).
2. Terminal SSE 'done' payload: re-emitted the stale compressor threshold, so
messages.js overwrote S.lastUsage and the indicator reverted on stream end.
Now rescales threshold to the resolved window when the stale cap was dropped.
Added 3 source-structure regression tests pinning both fixes; bumped the brittle
test_pr1341 distance limit 13000→15000 (+ noted it should become structural).
Co-authored-by: allenliang2022 <allenliang2022@users.noreply.github.com>
- test_pr1341 distance limit 9000→13000 (the PR legitimately added the
default-only pre-save guard block; the test is designed to be bumped when a
new pre-save mutation block lands — this was the only CI-red cause on shard 1).
- new tests/test_issue3256_context_length_default_only_guard.py: verifies the
global model.context_length cap applies ONLY to model.default (revert-fix-
verified — fails on master, passes with the fix).
Co-authored-by: allenliang2022 <allenliang2022@users.noreply.github.com>
