Multi-repo indexing + repo allowlist enforcement

[webdevtodayjason]

Thread Assignment

Thread C (Codex)

Problem

MVP indexes one local folder at a time. Phase 2 requires indexing multiple repos from one config and querying across all of them.

Requirements

• Add ~/.argentmunch/repos.yaml config format (list of repo paths + optional names)
• argentmunch index --config repos.yaml indexes all listed repos
• argentmunch query --all <query> searches across all indexed repos
• Repo allowlist enforcement: only repos listed in config can be indexed
• CLI argentmunch repos add/remove/list for managing the allowlist
• Index metadata tracks config-hash to detect config drift

Acceptance Criteria

1. Index 3+ repos from one config file → all appear in argentmunch list
2. Cross-repo query returns results from multiple repos, ranked by score
3. Attempt to index a repo NOT in allowlist → rejected with clear error
4. argentmunch repos list shows all configured repos with index status

Merge Gate

• Tests for multi-repo index, cross-repo query, allowlist enforcement
• PR linked to this issue

Execution Order

#4 in Sprint Slice 2 — after secure health lands.

[webdevtodayjason]

Sprint Slice 2 — Thread Update (2026-03-05)

Execution order updated. See full coordinator summary: https://github.com/ArgentAIOS/argentos/issues/76#issuecomment-4002350291

Reassigned from Thread C → Thread F (sequential with argentmunch #5). Priority 5.

[webdevtodayjason]

Integrated in PR #7: strict multi-repo allowlist behavior included.