Enable edit tool on scout agentic workflow

[Copilot]

Summary

This PR enables file editing capabilities for the scout agentic workflow by adding the edit: tool to its configuration.

Changes

Modified .github/workflows/scout.md to include the edit tool in the tools section:

tools:
  edit:
  cache-memory: true

The compiled workflow (.github/workflows/scout.lock.yml) automatically includes:

• Edit tool accessibility instructions in the agent's prompt
• --allow-tool write flag to enable file writing via the Copilot CLI
• --add-dir / to grant filesystem access for editing operations

Motivation

The scout agent performs deep research and may need to save findings, create documentation, or generate artifacts as files. Without the edit tool, the agent can only post comments but cannot persist information to the repository filesystem during its research process.

Testing

• ✅ All unit tests pass
• ✅ Workflow compiles successfully with no errors
• ✅ Code formatting and linting validated
• ✅ Complete validation with make agent-finish (all 64 workflows compiled)

Security Considerations

The edit tool provides write access with explicit directory permissions:

• Access to $GITHUB_WORKSPACE (the repository)
• Access to /tmp/gh-aw/ (temporary files)

This follows the same security pattern used by other workflows in the repository that require file editing capabilities (e.g., cli-version-checker.md, technical-doc-writer.md).

Original prompt

Enable edit tool on the scout agentic workflow

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✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.

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