[docs] Add branch-prefix documentation for repo-memory (Jan 7, 2026)

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Documentation Updates - January 7, 2026

This PR updates the documentation based on user-facing features merged in the last 24 hours.

Features Documented

• repo-memory branch-prefix (from Add configurable branch-prefix option for repo-memory #9195) - New configuration option to customize branch name prefix

Changes Made

Updated docs/src/content/docs/reference/memory.md to document the branch-prefix configuration option:

• Added explanation of branch-prefix parameter in Advanced Configuration section
• Included validation rules (4-32 characters, alphanumeric with hyphens/underscores, cannot be "copilot")
• Added example showing branch-prefix: daily creating daily/insights branch instead of memory/insights
• Updated Multiple Repo Memory Configurations section to demonstrate branch-prefix usage
• Clarified that branch-name defaults to {branch-prefix}/{id} where branch-prefix defaults to memory

Merged PRs Referenced

• Add configurable branch-prefix option for repo-memory #9195 - Add configurable branch-prefix option for repo-memory
• Add domain blocklist support via --block-domains flag #9063 - Add domain blocklist support via --block-domains flag (already documented)
• Enforce read-only permissions by default with dangerous-permissions-write feature flag #9218 - Enforce read-only permissions by default with dangerous-permissions-write feature flag (already documented)
• Create error recovery patterns documentation #9250 - Create error recovery patterns documentation (internal developer docs)
• Add daily GitHub remote MCP authentication test workflow #9249 - Add daily GitHub remote MCP authentication test workflow (internal testing)

Analysis Summary

Total PRs merged in last 24 hours: 20 PRs

User-facing features requiring documentation:

• ✅ repo-memory branch-prefix (Add configurable branch-prefix option for repo-memory #9195) - Documented in this PR
• ✅ Network blocked domains (Add domain blocklist support via --block-domains flag #9063) - Already documented in docs/src/content/docs/reference/network.md
• ✅ dangerous-permissions-write feature flag (Enforce read-only permissions by default with dangerous-permissions-write feature flag #9218) - Already documented in docs/src/content/docs/reference/permissions.md

Internal changes not requiring user documentation:

• Code refactoring (runtime_setup.go, Options structs)
• Developer documentation (error recovery patterns)
• Internal workflows (MCP auth testing, daily file diet)
• Bug fixes (firewall log parsing, mobile CSS)
• Internal tooling (campaign generator messages, speckit removal)

All other merged PRs in the last 24 hours were internal improvements, refactoring, or already had documentation included in their PRs. The documentation is now complete and up-to-date for all user-facing features from January 7, 2026.

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