COPILOT CLI TIGHTENS TOOL-CALL SAFETY; GITHUB APP UNBLOCKS AGENT PERMISSION FLOWS
GitHub Copilot CLI changed how tool calls are gated, and the GitHub app fixed permission dialogs that could stall agent runs. In the Copilot CLI pre-release, a...
GitHub Copilot CLI changed how tool calls are gated, and the GitHub app fixed permission dialogs that could stall agent runs.
In the Copilot CLI pre-release, a failed preToolUse hook now blocks the tool call instead of silently allowing it—plus fixes for tmux Ctrl+C handling, case-insensitive @-mention search, honoring repo-level extraKnownMarketplaces, and unblocking MCP servers launched via npx with a custom registry v1.0.57-4.
Separately, the GitHub app release fixes extension-permission dialogs disappearing or popping at session start when auto-approve is enabled, preventing stuck tools and odd UI states in agent sessions v0.2.19.
Tool invocations that used to slip through on hook errors are now denied, changing behavior and reducing risk.
MCP servers via npx with custom registries and repo-scoped marketplaces now work as intended for governed setups.
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terminal
Force a preToolUse hook error and confirm the tool call is denied; audit any workflows that relied on a silent allow.
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terminal
Launch MCP servers via npx --registry and verify they’re no longer blocked; validate repo-level extraKnownMarketplaces.
Legacy codebase integration strategies...
- 01.
If your pipelines depended on tools running despite hook errors, expect breakage—add retries or fix the hooks.
- 02.
Re-test tmux sessions, plugin packaging (no .git in installs), and permission dialogs to avoid flaky agent runs.
Fresh architecture paradigms...
- 01.
Design agent workflows assuming strict pre-exec checks; treat hook failures as a hard stop with explicit recovery.
- 02.
Use repo-level marketplace settings to curate approved tools per repo from day one.
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