Delta CC-06 — Claude Code dossier

DELTA CC-06 / Claude Code

model: alias in agent frontmatter hardcoded to a dated model ID on Bedrock/Vertex, ignoring ANTHROPIC_MODEL — all three issues closed stale/duplicate without a linked fix (re-checked 2026-06-11)

openopened 2026-02

Description

UPDATE 2026-06-28: the Opus 4.1 crash/400 behavior is resolved — docs now show Opus 4.6 on Bedrock/Vertex and document ANTHROPIC_DEFAULT_OPUS_MODEL. The residual is per-provider version lag by design, not a fault; recommend rescoping or closing this delta on next pass.
UPDATE 2026-07-17: left open this pass — per D0086, a delta closes only on TD re-verification of its stated falsification criterion, never on vendor release notes alone, and no TD-executed alias-resolution repro was run against Bedrock/Vertex this pass. The rescoping/closing recommendation stands for the next pass that can execute the repro.

Closes when

model: opus in agent frontmatter resolves to the provider's current alias target, or honors ANTHROPIC_DEFAULT_OPUS_MODEL, on Bedrock/Vertex, re-verified on a current release

Evidence

[1][2][3]Re-verified open 2026-06-28 against v2.1.195Re-verified 2026-07-17 (v2.1.212, source-reviewed, not TD-executed): #22587/#25530/#27754 unchanged (closed not-planned/duplicate); no repro run against the current releaseRe-verified 2026-07-19 (v2.1.215, source-reviewed, not TD-executed): #22587/#25530/#27754 remain closed not-planned/duplicate; corroborated by fresh open issue #73556 (2026-07-02) and closed duplicate #58274