Problem:
When users execute `/think off`, they still receive `reasoning_content`
from models configured with `reasoning: true` (e.g., GLM-4.7, GLM-4.6,
Kimi K2.5, MiniMax-M2.1).
Expected: `/think off` should completely disable reasoning content.
Actual: Reasoning content is still returned.
Root Cause:
The directive handlers delete `sessionEntry.thinkingLevel` when user
executes `/think off`. This causes the thinking level to become undefined,
and the system falls back to `resolveThinkingDefault()`, which checks the
model catalog and returns "low" for reasoning-capable models, ignoring the
user's explicit intent.
Why We Must Persist "off" (Design Rationale):
1. **Model-dependent defaults**: Unlike other directives where "off" means
use a global default, `thinkingLevel` has model-dependent defaults:
- Reasoning-capable models (GLM-4.7, etc.) → default "low"
- Other models → default "off"
2. **Existing pattern**: The codebase already follows this pattern for
`elevatedLevel`, which persists "off" explicitly to override defaults
that may be "on". The comment explains:
"Persist 'off' explicitly so `/elevated off` actually overrides defaults."
3. **User intent**: When a user explicitly executes `/think off`, they want
to disable thinking regardless of the model's capabilities. Deleting the
field breaks this intent by falling back to the model's default.
Solution:
Persist "off" value instead of deleting the field in all internal directive handlers:
- `src/auto-reply/reply/directive-handling.impl.ts`: Directive-only messages
- `src/auto-reply/reply/directive-handling.persist.ts`: Inline directives
- `src/commands/agent.ts`: CLI command-line flags
Gateway API Backward Compatibility:
The original implementation incorrectly mapped `null` to "off" in
`sessions-patch.ts` for consistency with internal handlers. This was a
breaking change because:
- Previously, `null` cleared the override (deleted the field)
- API clients lost the ability to "clear to default" via `null`
- This contradicts standard JSON semantics where `null` means "no value"
Restored original null semantics in `src/gateway/sessions-patch.ts`:
- `null` → delete field, fall back to model default (clear override)
- `"off"` → persist explicit override
- Other values → normalize and persist
This ensures backward compatibility for API clients while fixing the `/think off`
issue in internal handlers.
Signed-off-by: Liu Yuan <namei.unix@gmail.com>
Tests verify:
- Success message shown when session state available
- Error message shown when sessionEntry missing
- Error message shown when sessionStore missing
- No model message when no /model directive
Covers edge cases for #1435 fix.
Previously, the /model command would display 'Model set to X' even when
the session state wasn't actually persisted (when sessionEntry, sessionStore,
or sessionKey were missing). This caused confusion as users saw success
messages but the model didn't actually change.
This fix:
- Tracks whether the model override was actually persisted
- Only shows success message when persist happened
- Shows a clear error message when persist fails
AI-assisted: Claude Opus 4.5 via Clawdbot
Testing: lightly tested (code review, no runtime test)
