spec: Watch remote refs for updates

[oz-for-oss]

Summary

• Adds a product spec for watching loose remote-tracking refs and refreshing only repositories whose current branch tracks the changed ref.
• Adds a tech spec grounded in the repo watcher, Git path filtering, repository routing, and code review metadata refresh flow.
• Documents non-goals including packed refs, network polling, and unrelated repository refreshes.

Validation

• git diff --cached --check
• Reviewed staged files to confirm only specs/GH10090/product.md and specs/GH10090/tech.md were committed.

Related issue: #10090

[oz-for-oss]

@oz-for-oss[bot]

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[oz-for-oss]

Overview

The product and tech specs define a narrow filesystem-watcher enhancement for loose remote-tracking refs, including normal repositories, linked worktrees, routing by current-branch upstream, validation coverage, and explicit non-goals for packed refs and network polling.

Concerns

• No blocking concerns found for completeness, clarity, feasibility, issue alignment, internal consistency, or the supplemental security pass.

Verdict

Found: 0 critical, 0 important, 0 suggestions

Approve

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[kevinchevalier]

• spec: Watch remote refs for updates #10094 👈 (View in Graphite)
• master

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