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benbrandt merged 1 commit into from
Jun 3, 2026
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docs(rfd): Move session usage RFD to Preview #1351

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7 changes: 5 additions & 2 deletions docs/docs.json
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Expand Up @@ -183,7 +183,6 @@
"rfds/agent-telemetry-export",
"rfds/proxy-chains",
"rfds/mcp-over-acp",
"rfds/session-usage",
"rfds/end-turn-token-usage",
"rfds/auth-methods",
"rfds/diff-delete",
Expand All @@ -210,7 +209,11 @@
},
{
"group": "Preview",
"pages": ["rfds/rust-sdk-v1", "rfds/session-delete"]
"pages": [
"rfds/rust-sdk-v1",
"rfds/session-delete",
"rfds/session-usage"
]
},
{
"group": "Completed",
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3 changes: 2 additions & 1 deletion docs/rfds/session-usage.mdx
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Expand Up @@ -244,4 +244,5 @@ For agents that only provide usage during active prompting, the client UI may no
- 2025-12-13: Changed from `session/status` request method to `session/update` notification with `sessionUpdate: "context_update"`. Made `cost` optional and removed `remaining` field (clients can compute as `size - used`). This approach provides more flexibility for agents and follows the same pattern as other dynamic session properties.
- 2025-12-17: Renamed `reasoning_tokens` to `thought_tokens` for consistency with ACP terminology. Removed `percentage` field (clients can compute as `used / size * 100`).
- 2025-12-19: Renamed `sessionUpdate: "context_update"` to `sessionUpdate: "usage_update"` to better reflect the payload semantics (includes both context window info and cumulative cost).
- 2026-06-02: Split end-turn token accounting into a separate draft RFD and moved this context size and cost RFD toward Preview.
- 2026-06-02: Split end-turn token accounting into a separate draft RFD.
- 2026-06-03: Moved to Preview.
7 changes: 7 additions & 0 deletions docs/rfds/updates.mdx
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Expand Up @@ -6,6 +6,13 @@ rss: true

This page tracks lifecycle changes for ACP Requests for Dialog. For broader ACP announcements, see [Updates](/updates).

<Update label="June 3, 2026" tags={["Preview"]}>
## Session Usage RFD moves to Preview stage

The RFD for adding `usage_update` session notifications for context window size and cumulative session cost has been moved to Preview stage. Please review the [RFD](/rfds/session-usage) for more information on the current proposal and provide feedback before the feature is stabilized.

</Update>

<Update label="June 2, 2026" tags={["Draft"]}>
## v2 Plan Variants RFD moves to Draft stage

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