implement session usage RFD #415
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benbrandt
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Jan 29, 2026
I experimented with https://agentclientprotocol.com/rfds/session-usage (see agentclientprotocol/agent-client-protocol#415), but the Claude Agent SDK does not seem to return the information we need for an accurate context indicator. For example, one request to explore a project returned 500k+ cached read tokens in Claude's `result` message, while the agent reported 64k tokens used. I can open a PR with those changes for reference once the Typescript SDK is updated. To allow users to still see the current context usage, allowing to run `/context` seems to be the second best option. This PR changes the code to handle the `<local-command-stdout>` message that the SDK generates when sending `/context` and includes `/context` as allowed command. Screenshot from Tidewave with this change: <img width="460" height="1079" alt="image" src="https://github.com/user-attachments/assets/a3796e46-4014-4988-a993-e13d38d38d96" />
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Implements #316.