Move three pure helpers from src/shared/ into @oh-my-opencode/model-core so the package can stand alone without depending on plugin internals:
- buildModelCapabilitiesSnapshotFromModelsDev + fetchModelCapabilitiesSnapshot (models.dev normalization)
- parseModelSuggestion (cross-provider ProviderModelNotFoundError suggestion extraction)
- resolveActualContextLimit (Anthropic GA 1M context override)
Split provider-model-id-transform into two variants exposed by model-core:
- transformModelForProvider keeps the runtime dash to dot Anthropic rewrite used by the SDK
- transformModelForProviderDisplay preserves hyphenated Anthropic IDs so the installer writes registry-compatible model strings, fixing the ProviderModelNotFoundError fresh installs hit when the dotted form leaks into the config
src/shared/* and src/cli/provider-model-id-transform.ts collapse to re-export shims that point at the new core modules. Stale src/shared/{known-variants,model-capability-aliases,model-capability-guardrails,model-capability-heuristics}.ts re-export files plus the duplicated context-limit-resolver test are removed in favor of the canonical model-core copies.
Tests: bun test packages/model-core src/shared/model-capabilities-cache.test.ts src/cli/provider-model-id-transform.test.ts
Anthropic made the 1M context window GA for Opus 4.6, Sonnet 4.6, and 4.7 models on March 13, 2026 — no beta header required. The resolver was still falling back to 200K when no modelContextLimitsCache entry existed, causing premature compaction and over-truncation.
Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)
Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
Updates the canonical Anthropic Opus model in every fallback chain
(sisyphus, oracle, prometheus, metis, momus, visual-engineering,
ultrabrain, deep, artistry, unspecified-high), the unspecified-high
category default, the think-mode HIGH_VARIANT_MAP, the Claude Code
alias map, the claude-thinking legacy alias, the context-limit GA
regex, and event.ts fallback strings.
Widens supportsCachedAnthropicLimit to accept both claude-*-4-6 and
claude-*-4-7 so the 1M context cache still applies across the bump.
Regenerates the bundled model-capabilities snapshot from models.dev
and the model-fallback snapshot to match the new source output.
- fix(context-limit): check modelContextLimitsCache for all Anthropic
models, not just GA-model set; user config/cache wins over 200K default
(fixes#2836)
- fix(agent-key-remapper): preserve config key aliases alongside display
names so `opencode run --agent sisyphus` resolves correctly
(fixes#2858)
- fix(tool-config): respect host permission.skill=deny by disabling
skill/skill_mcp tools when host denies them (fixes#2873)
- test: update context-limit and agent-key-remapper tests to match new
behavior
After Anthropic's 1M context GA (2026-03-13), the beta header is no
longer sent. The existing detection relied solely on the beta header
to set anthropicContext1MEnabled, causing all Anthropic models to
fall back to the 200K default despite models.dev reporting 1M.
Update resolveActualContextLimit to check per-model cached limits
from provider config (populated from models.dev data) when the
explicit 1M flag is not set. Priority order:
1. Explicit 1M mode (beta header or env var) - all Anthropic models
2. Per-model cached limit from provider config
3. Default 200K fallback
This preserves the #2460 fix (explicit 1M flag always wins over
cached values) while allowing GA models to use their correct limits.
Fixes premature context warnings at 140K and unnecessary compaction
at 156K for opus-4-6 and sonnet-4-6 users without env var workaround.
- Replace overly broad .includes('anthropic') with exact provider ID
matching against known Anthropic providers (anthropic, google-vertex-
anthropic, aws-bedrock-anthropic) in context-limit-resolver
- Add afterEach cleanup for vision-capable-models cache in look-at
tool tests to prevent cross-test state leakage
- New context-limit-resolver.ts with resolveActualContextLimit() shared helper
- Anthropic provider detection now uses .includes('anthropic') instead of hard-coded IDs
- Both context-window-monitor and dynamic-truncator use the shared resolver
- Added missing test cases: Anthropic+1M disabled+cached limit, non-Anthropic without cache
YeonGyu-Kim