papayo-oai b244e9bafe Add a command-start callback for tool lifecycle extensions (#46539) ...

## What changed

Add `ToolLifecycleContributor::on_command_start` with `CommandStartInput` carrying the resolved command, working directory, selected executor's filesystem, and lifecycle context. Await contributors after command hooks and environment resolution so they can prepare the filesystem before `exec_command` runs, including calls from code mode.

Reserve process IDs only after preparation completes so cancelled preparation does not consume an ID. Keep deterministic process IDs from being reused after removal.

## Testing

Add tests for direct and code-mode calls that verify callbacks receive hook-rewritten commands and the executor's working directory, filesystem preparation completes before execution, and interrupted preparation prevents execution without consuming a process ID. Add a regression test for deterministic process ID reuse after removal.

GitOrigin-RevId: d10bcafcc583a6e3e8b5924d004806727e3763bb

2026-09-19 00:46:06 +00:00

..

examples

Require content kinds for extension prompt fragments (#40177)

2026-08-23 03:12:58 +00:00

src

Add a command-start callback for tool lifecycle extensions (#46539)

2026-09-19 00:46:06 +00:00

tests

Retire the unused Guardian extension prototype API (#45679)

2026-09-15 11:39:20 +00:00

BUILD.bazel

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Cargo.toml

Add a command-start callback for tool lifecycle extensions (#46539)

2026-09-19 00:46:06 +00:00

notes.md

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