rust(feat): add sift-cli agent lifecycle for Claude and Codex - #704
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Add `sift-cli agent install|update|doctor|uninstall`, replacing the removed project-scoped skill writer with four stateless, user-scoped commands. State is derived from the installed files and each client's own MCP config, so there is no state file to drift. Register through each client's native CLI (`claude mcp`, `codex mcp`) rather than editing their config files. Codex registrations are only treated as Sift-managed when both the transport and the surrounding metadata match what this CLI writes, so a hand-tuned entry is reported as a conflict instead of being silently replaced. Native replacement is remove-then-add, and a failed add restores the previous entry. Install and update preflight every target and refuse to touch an unmanaged same-name skill or MCP entry. Skill install mirrors the embedded bundle exactly, so files a previous release left behind are removed. Registrations default to read-only; update preserves whatever mode is already installed and rejects a mixed fleet rather than picking for the user. Point the MCP server's instructions and destructive-tool refusal at these commands, and make `agent update` refuse to run on an outdated CLI, printing the installer for the newer release. Release lookup now skips drafts and prereleases. Rollback of a partial multi-client install is covered by the native replacement test here; the cross-client transaction tests arrive with the JSON-backed clients, which can be driven without a fake process runner.
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Changes
Adds
sift-cli agent install|update|doctor|uninstall, replacing the removed project-scoped skill writer with four stateless, user-scoped commands. State is derived from the installed files and each client's own MCP config, so there is no state file to drift.Registers through each client's native CLI (
claude mcp,codex mcp) rather than editing their config files. A Codex registration counts as Sift-managed only when both the transport and the surrounding metadata match what this CLI writes, so a hand-tuned entry is reported as a conflict instead of being silently replaced. Native replacement is remove-then-add, and a failed add restores the previous entry.Install and update preflight every target and refuse to touch an unmanaged same-name skill or MCP entry. Skill install mirrors the embedded bundle exactly, so files a previous release left behind are removed. Registrations default to read-only; update preserves whatever mode is installed and rejects a mixed fleet rather than choosing for the user.
Points the MCP server's instructions and destructive-tool refusal at these commands, and makes
agent updaterefuse to run on an outdated CLI, printing the installer for the newer release. Release lookup now skips drafts and prereleases.Verification
cargo fmt --check --all,cargo clippy --all-features,cargo test --all-featurescmd::agenttests plus thecmd::versionrelease-filter testNote for reviewers
Rollback of a partial multi-client install is covered here by the native replacement test. The cross-client transaction tests arrive with the JSON-backed clients in the next PR, which can be driven directly without a fake process runner.