Evidence record / github-copilot-cli
A dated record of one change, kept so the writing that cites it can be checked. Compiled from the sources listed below by the research run, not written for reading. The judgment lives in the issues that cite it, below.
2026-09-21-github-copilot-cli-capability-worktrees-out-of-experimental-fleet-custom-agents-read-repo-instructions
Capability: worktrees out of experimental, --fleet, custom agents read repo instructions. /worktree, /move, and --worktree work without experimental mode (1.0.85, L137); worktreePathTemplate controls where they go (1.0.87, L5). Custom agents can opt into AGENTS.md, copilot-instructions.md and CLAUDE.md with include-custom-instructions: true (1.0.86, L31). Plugin-contributed agents can be selected and run (1.0.85, L109). Docs describe --fleet for parallel sub-task fan-out from -p, not supported with --acp.
Channel: tagged-release (1.0.85, 1.0.86, 1.0.87); docs-only for --fleet. Half: capability. Date: 2026-09-15 to 2026-09-21.
Operator consequence: Try: parallel worktree sessions are now a supported path, not an experiment. --fleet is a doc claim with no version pin; confirm with copilot --help on your installed version before building CI on it.
Receipt
Finding metadata
Run: 2026-09-21-weekly-digest-2026-08-20_2026-09-21-frontier-v0
Finding ID: 2026-09-21-github-copilot-cli-capability-worktrees-out-of-experimental-fleet-custom-agents-read-repo-instructions
Profile citations
- github-copilot-cli / claim / worktrees-fleet-custom-agents
Source links
Primary links, including exact changelog lines when available.
- tagged commit file2026-09-21-github-copilot-cli-capability-worktrees-out-of-experimental-fleet-custom-agents-read-repo-instructionsgithub/copilot-cli / changelog.md#L137commit2026-09-21-github-copilot-cli-capability-worktrees-out-of-experimental-fleet-custom-agents-read-repo-instructionsgithub.com/github/docs/commit/d33e22cae269
Versioned source: run artifact