* polish: cut per-turn overhead, stabilize cache, add /new
Context economy
- Compaction: preserveLast 8->6, triggerRatio 0.8->0.7 (both copies in sync).
- System prompt: kill the "ELABORATE summary" directive; scale summary to
the work. Comment discipline moved into the core prompt for all model
families (was Anthropic-only); Minimax/DeepSeek/Qwen/etc. now get it.
- Token-budget regression test ratchets the fixed per-turn overhead (base
prompt + eager tool schemas) using the runtime's own estimator, so silent
prompt/schema growth fails CI.
Response quality
- defaultResponseStyle balanced->concise. Reversible via /style.
Tool discovery
- <available_skills> block in the system prompt lists installed skills
(name + one-line description) so the model loads the right one on the
first call instead of guessing and reading the failure. Budget-capped at
640 bytes with an "...and N more" fallback; renders nothing when no
skills are installed (byte-identical to prior prompt).
Session lifecycle
- /new starts a fresh session in place; previous session stays on disk and
is named in the confirmation for /resume. Guards against mid-run reset.
- /clear now notes that context persists and points to /new.
Performance & caching
- partitionTools no longer alpha-sorts the whole tools array every turn,
which inserted a loaded deferred tool mid-array and shifted the cached
prefix on every load. It now builds append-only regions
[eager sorted] + [tool_search] + [loaded deferred sorted] so a
mid-session load grows the tail instead of busting the eager prefix.
Regression test asserts the eager block precedes any loaded tool.
- /context now shows cache hit rate (flags low rate over >5 turns as a
possible unstable prefix) and rolling average turn latency with
time-to-first-token. Both reset on /new.
Measured baselines (auto-mode, no workspace): base prompt 3162 tokens,
eager tool schemas 2433 across 12 tools. Budget ceilings set ~10% above.
Deliberately deferred (need a decision): inverted safety-policy rewrite
(sandbox doesn't catch ~half the B-tier rules), core-tool/web_fetch
deferral (activation-semantics blocker), aggressive prompt slim.
* fix(tui): clear staged attachments + queued message on /new
CodeRabbit: startNewSession reset conversation/usage/latency state but not
the staged input (pendingImages, pendingImageLabels, pendingDocuments,
queuedMessage), which is only consumed at prompt-submit. Without clearing it,
the fresh session's first prompt silently inherited the previous session's
images/documents/queued text. Test now stages all four and asserts they clear.
