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conductor/archive/gemini_cli_parity_20260225/spec.md

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+# Specification: Gemini CLI Parity
+
+## Overview
+Achieve full functional and behavioral parity between the Gemini CLI integration (`gemini_cli_adapter.py`, `cli_tool_bridge.py`) and the direct Gemini API implementation (`ai_client.py`). This ensures that users leveraging the Gemini CLI as a headless backend provider experience the same level of capability, reliability, and observability as direct API users.
+
+## Functional Requirements
+- **Token Estimation Parity:** Implement accurate token counting for both input and output in the Gemini CLI adapter to match the precision of the direct API.
+- **Safety Settings Parity:** Enable full configuration and enforcement of Gemini safety filters when using the CLI provider.
+- **Tool Calling Parity:** Synchronize tool definition mapping, call handling, and response processing between the CLI bridge and the direct SDK.
+- **System Instructions Parity:** Ensure system prompts and instructions are consistently passed and handled across both providers.
+- **Bridge Robustness:** Enhance the `cli_tool_bridge.py` and adapter to improve latency, error handling (retries), and detailed subprocess observability.
+
+## Non-Functional Requirements
+- **Observability:** Detailed logging of CLI subprocess interactions for debugging.
+- **Performance:** Minimize the overhead introduced by the bridge mechanism.
+- **Maintainability:** Ensure that future changes to `ai_client.py` can be easily mirrored in the CLI adapter.
+
+## Acceptance Criteria
+- [ ] Token counts for identical prompts match within a 5% margin between CLI and Direct API.
+- [ ] Safety settings configured in the GUI are correctly applied to CLI sessions.
+- [ ] Tool calls from the CLI are successfully executed and returned via the bridge without loss of context.
+- [ ] System instructions are correctly utilized by the model when using the CLI.
+- [ ] Automated tests verify that responses and tool execution flows are identical for both providers.
+
+## Out of Scope
+- Performance optimizations for the `gemini` CLI binary itself.
+- Support for non-Gemini CLI providers in this track.