The 5th registry row: id "anthropic", ANTHROPIC_API_KEY > auth.json
"anthropic" scope, api.anthropic.com/v1 with KIGI_ANTHROPIC_BASE_URL
override, Messages dialect. Two new spec dimensions most future rows
reuse: ListingDialect (Anthropic's /v1/models wants x-api-key +
anthropic-version headers, ?limit=1000, and its own response shape) and
PlatformKeyHeader (Bearer vs x-api-key across listing/validation/
inference, with auth_scheme stamped onto entries).
The 2026 Anthropic listing serves real metadata: the adapter maps
max_input_tokens, per-level effort capabilities (low..max as the menu,
xhigh/max distinct), thinking/image flags — and enrichment fills only
genuine wire gaps (e2e pins wire-1M beating enrichment, and a zero
context filled to 200k).
Two review-confirmed defects fixed red-green:
- Output caps were dropped at three layers, so every sub-128K-output
model (64k Haiku, legacy models) would 400 on EVERY request against
the sampler's 128K max_tokens default. Wire max_tokens and enrichment
limit.output now flow to entry.max_completion_tokens.
- An explicit wire effort-decline was indistinguishable from wire
silence, letting enrichment inject effort menus pre-4.6 models reject
(adaptive thinking 400). The adapter now emits a decline sentinel
(support:false) that enrichment respects — proven end to end.
Also: the Messages client now sends anthropic-version (previously never
sent — real api.anthropic.com rejects such requests; pinned across all
three scheme/backend quadrants), key validation builds per-key-header
requests, missing listing data fails fast, empty-id ghosts drop with a
warning, kimi-import recognizes api.anthropic.com as built-in
automatically.
ZacharyZhang-NY
b86722f508