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fix(claude): only enable 1M context beta when model has [1m] suffix #273

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Merged
floodsung merged 1 commit into from
May 14, 2026
Merged

fix(claude): only enable 1M context beta when model has [1m] suffix #273

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17 changes: 14 additions & 3 deletions src/engines/claude/executor.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -365,9 +365,20 @@ export class ClaudeExecutor {
queryOptions.resume = sessionId;
}

// Beta flags are ignored by the SDK on OAuth/Pro-Max auth. For 1M context,
// use the model-name suffix `[1m]` (e.g. `claude-opus-4-7[1m]`) instead.
queryOptions.betas = ['context-1m-2025-08-07'];
// 1M context window is opt-in via the `[1m]` model-name suffix
// (`claude-opus-4-7[1m]`). The suffix is the canonical signal — the SDK
// parses it directly on both OAuth and API-key auth paths.
//
// We *also* set the matching `betas` flag when the suffix is present,
// belt-and-braces: harmless when the SDK already inferred it, and a
// safety net if a future SDK rev only honors the explicit beta header
// for some auth modes. Without the suffix, leave `betas` unset —
// setting it unconditionally on API-key auth had the side-effect of
// forcing every model (e.g. plain `opus-4-7`) into 1M context at 2×
// the price, which the user never asked for.
if (this.config.claude.model?.includes('[1m]')) {
queryOptions.betas = ['context-1m-2025-08-07'];
}

return queryOptions;
}
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17 changes: 15 additions & 2 deletions src/engines/claude/persistent-executor.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -365,8 +365,21 @@ export class PersistentClaudeExecutor extends EventEmitter {
append: '\n\n' + appendSections.join('\n\n'),
};
}
// Beta flags (parity with legacy executor)
queryOptions.betas = ['context-1m-2025-08-07'];
// 1M context window is opt-in via the `[1m]` model-name suffix
// (`claude-opus-4-7[1m]`). The suffix is the canonical signal — the SDK
// parses it directly on both OAuth and API-key auth paths.
//
// We *also* set the matching `betas` flag when the suffix is present,
// belt-and-braces: harmless when the SDK already inferred it, and a
// safety net if a future SDK rev only honors the explicit beta header
// for some auth modes. Without the suffix, leave `betas` unset —
// setting it unconditionally on API-key auth had the side-effect of
// forcing every model (e.g. plain `opus-4-7`) into 1M context at 2×
// the price, which the user never asked for. (Parity with legacy
// executor; both spots must stay in sync.)
if (this.options.model?.includes('[1m]')) {
queryOptions.betas = ['context-1m-2025-08-07'];
}

// Hooks: AskUserQuestion (mirrored from legacy executor — required so
// that questions can be answered by users via Feishu cards) + Agent
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