* fix(chatcore): exempt opencode client from the default 128-tool truncation
The default MAX_TOOLS_LIMIT (128) cap made truncateToolList blind-slice
tools.slice(0, 128), dropping opencode's built-in task tool and part of
its MCP tools when the inbound list exceeded 128 — so models routed
through OmniRoute could not launch subagents or reach all their tools.
Detect the opencode client (any x-opencode-* header, or 'opencode' in
the user-agent) and bypass ONLY the speculative 128 default. A known
provider ceiling (proactive PROVIDER_TOOL_LIMITS or a detected limit)
always wins and still truncates, even for opencode, so upstreams with
real hard limits (e.g. grok-cli 200) keep their 400-avoidance guard.
Non-opencode clients are unchanged.
- requestFormat.ts: add isOpencodeClient(headers, userAgent) + expose it
on resolveChatCoreRequestFormat.
- toolLimitDetector.ts: add getKnownToolLimit(); getEffectiveToolLimit
becomes getKnownToolLimit(provider) ?? DEFAULT_LIMIT (byte-identical
for existing callers).
- upstreamBody.ts: truncateToolList takes bypassDefaultToolLimit and
encodes the precedence; fix cosmetic debug-log count.
- chatCore.ts: thread the flag into prepareUpstreamBody.
- tests: extend tool-limit-detector unit tests.
* refactor(tools): accept nullable provider in tool-limit resolvers
Address PR review: widen getKnownToolLimit / getEffectiveToolLimit to
(provider: string | null | undefined) to match the call sites in
truncateToolList, and add unit assertions covering null/undefined
providers (getKnownToolLimit -> null, getEffectiveToolLimit -> 128).
---------
Co-authored-by: DKotsyuba <16292493+DKotsyuba@users.noreply.github.com>
Co-authored-by: Diego Rodrigues de Sa e Souza <diegosouza.pw@gmail.com>
Release v3.8.33 — full CHANGELOG in the PR body. Blocking gates green (Build, Lint, Unit Tests 8/8, Package Artifact, Quality Gates, Quality Ratchet, Docs Sync, PR Test Policy, test-vitest). Admin-merged over a Node 26 future-compat timer flake (1/4) + an E2E UI flake (3/9) — both verified non-deterministic; full test:unit validated locally (16936 pass).
