feat(anthropic): adaptive thinking-effort envelope (DTE series 2/5)

[easonLiangWorldedtech]

≤400-line redo of Zoo-Code-Org#1338 — DTE series 2/5, unit 5/5

Anthropic adaptive thinking-effort envelope (DTE-2d): the effective per-request
thinking effort is resolved at the shared resolveEffectiveReasoningEffort
point (per-request override → settings → model default), and adaptive-thinking
requests whose effective effort is in-range (low|medium|high|xhigh|max)
carry output_config: { effort } on the message request; out-of-range or
unset efforts omit the envelope so the API default applies. Both the streaming
and non-streaming request sites get the envelope.

Stack

• Base: feat/dte-v2-4-effort-persistence @ 111cf40ae (U4, PR feat(task): persist task thinking effort on history items (DTE series 2/5) #39)
• Content source: feat/dte-trial-all union 27a2e97df (tag dte-legacy/union), U5 slice
• Related: DTE-v2 final ship plan - 39-unit 400-line redo of the DTE series (supersedes #28) #35 (DTE-v2 tracking ledger)

Budget (plan §2: a+d ≤ 400)

2 files changed, 340 insertions(+), 1 deletion(-) = 341 ≤ 400 ✓

File	a+d
src/api/providers/anthropic.ts	43+/1−
src/api/providers/__tests__/anthropic-adaptive-effort.spec.ts (new)	297+

Provenance / fidelity

• Both files are whole-file extracts, blob-identical to the union
  27a2e97df (anthropic.ts blob c0843d29a, spec blob 7f37b8dc),
  taken from 77ec064d3 (DTE-2 content tip). No 3-way merge needed: the
  anthropic.ts region the slice touches is drift-free at the U4 head
  (verified: empty diff of anthropic.ts between the dte-2 base
  39bdfb188 and the U4 head).
• anthropic.ts delta = 6ea45b36a (28+/1−: shared imports, envelope
  resolution, both request sites) + 90b47b053 (+15: createMessage JSDoc).
• Exclusion (stale plan row): webview-ui/src/components/settings/__tests__/ExperimentalSettings.spec.tsx
  (1+/75−) is NOT part of this unit. Forensics (diff 39bdfb188..77ec064d3)
  proves the DTE-2 series never touched that file — its
  dynamicThinkingEffort block and fireEvent import arrived via
  U1/main and are already present at the U4 head (blob 3feddad1, identical
  to the union). The real +75 for that file belongs to Wave 3 (U11).
• src/eslint-suppressions.json: untouched (no U5-owned count changes).

Out of scope (series complete)

• None — U5 completes DTE series 2/5 (U1–U5 all ≤ 400). Next: Wave 3 (dte-3,
  from b17373bb9).

Verification (local)

• pnpm --dir src exec eslint --prune-suppressions --max-warnings=0 api/providers/anthropic.ts api/providers/__tests__/anthropic-adaptive-effort.spec.ts → exit 0, no count change
• pnpm check-types → 11/11 projects
• pnpm --dir src exec vitest run api/providers/__tests__/anthropic-adaptive-effort.spec.ts → 20/20 (1.03 s)
• git diff --shortstat 111cf40ae HEAD → 340+/1− = 341 ≤ 400

[easonLiangWorldedtech]

Superseded — U5 will be opened on upstream (Zoo-Code-Org/Zoo-Code) when its stack slot opens (max 3 open DTE-v2 PRs, ship plan 2.2). Head d77abcd unchanged.