upstream(sync): complete Projects trees and v3 engine

[devin-ai-integration]

Summary

• Retains every tracked repository path while bounding eager previews to the first 250 blobs; later/large files load through a fail-closed deferred-content Tauri command, and the desktop tree paginates 200 entries at a time.
• Adds canonical buzz://project, repository-tab, and commit links plus cross-channel discussion discovery without restoring upstream Projects navigation chrome.
• Adds Nostr kind-1 issue assignment/unassignment across SDK, CLI, desktop managed-owner signing, exhaustive relay fetching, causal authorization/state projection, and assignee UI.
• Records the selective Buzz 0.5.18 sync: accepts the Projects engine changes from fix(desktop): show complete repository trees block/buzz#5102/Projects v3: unify sharing, discussions, and issue ownership block/buzz#5792 while explicitly rejecting the Projects rail, top-level Projects navigation, overview chrome, and Workbench destination to preserve Crew's channel-first IA.

Related issue

Fixes #270

Related: #278, #285

Testing

Passed locally:

• pnpm --filter buzz check
• pnpm --filter buzz typecheck
• pnpm --filter buzz test — 5,532 passed, 1 skipped
• just check-compile
• Tauri cargo check --all-targets
• targeted SDK, CLI, and Tauri assignment tests
• desktop E2E mock-bridge verification on exact commit 17ec8d5 — 4/4 temporary specs passed headless and headed

just test-unit still reports four unrelated baseline failures reproduced identically from clean main: three stale buzz-cli command-inventory assertions (org / call) and one stale buzz-db embedded-migration count assertion (31 actual vs. 30 expected). Issue-specific assignment tests pass.

Two committed project specs remain locally unrunnable on clean main and this branch because they navigate to /projects while the hash-history router and static E2E server require /#/projects; the exact-commit temporary specs use the working route.

Quantitative repository-tree evidence: clean main truncated after 250 backend paths and exposed only the first 200 desktop entries; this branch retains all 252 paths in the Rust regression fixture and paginates the 258-entry UI fixture as 200 + 58 while fetching deferred file content only after selection.

Complete tree and deferred content

Before: the repository tree is truncated and deferred content is unavailable.

After: the complete tree is paginated and deferred content loads on selection.

Projects v3 surfaces

NOTES

DONE - what is implemented, tests added, gates run + results, evidence files/links

• Implemented the issue upstream(sync): Projects engine — complete repo trees + v3 backend (#5102, #5792) #270 selective Projects-engine sync: complete tracked repository trees, bounded eager previews, deferred file loading, desktop pagination, canonical project/repository/commit links, cross-channel discussion discovery, Nostr assignment/unassignment in SDK/CLI/desktop, causal authorization/state projection, and channel-first UI guardrails.
• Added RED/GREEN Rust, desktop, SDK, CLI, and Tauri tests. Passed pnpm --filter buzz check, pnpm --filter buzz typecheck, pnpm --filter buzz test (5,532 passed, 1 skipped), just check-compile, Tauri cargo check --all-targets, targeted assignment/tree tests, and exact-commit E2E (4/4 headless and 4/4 headed) at 17ec8d5.
• just test-unit reports four unrelated failures reproduced identically on clean main: three stale buzz-cli command-inventory assertions and one stale buzz-db migration-count assertion.
• Full-screen before/after screenshots are embedded above and hosted at immutable commit 959d7772ff1f346faf1eed70cf9395a6434205b1. Local evidence: /home/ubuntu/evidence/issue-270/before/, /home/ubuntu/evidence/issue-270/after/, /home/ubuntu/evidence/issue-270/pr-screenshots/, /home/ubuntu/evidence/issue-270/*.log, and /home/ubuntu/evidence/issue-270/after/issue-270-pr315-recording.mp4.
• CI showed the expected parent-controlled cancellation (NuncioCrew Gate failed because CI Policy was cancelled); it was not retriggered or modified.

IN PROGRESS - what is half-done, which files, what state it is in

• Nothing. The branch is clean, signed, pushed, and the implementation/evidence are complete.

TODO / NEXT - remaining steps for whoever picks this up, known risks, conflicts expected

• Parent session should serialize/re-run CI when this PR reaches the merge queue, resolve any sibling upstream-sync conflicts, and merge only after its policy gates pass.
• Optional follow-up outside upstream(sync): Projects engine — complete repo trees + v3 backend (#5102, #5792) #270: repair the two pre-existing project E2E specs that navigate to /projects instead of the hash route /#/projects, and refresh the stale clean-main unit-test inventory/migration baselines.
• Conflict risk is concentrated in Projects UI/model files shared with sibling Buzz 0.5.18 sync PRs; preserve the channel-first sidebar and reject Projects rail/top-level Projects/Workbench chrome during resolution.

Link to Devin session: https://app.devin.ai/sessions/992136c854bd4ea0945215f4b15bc079
Requested by: @oscarlehuu

[devin-ai-integration]

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[devin-ai-integration]

Screenshots

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Screenshots

[devin-ai-integration]

DONE - what is implemented, tests added, gates run + results, evidence files/links

• Implemented the issue upstream(sync): Projects engine — complete repo trees + v3 backend (#5102, #5792) #270 selective Projects-engine sync: complete tracked repository trees, bounded eager previews, deferred file loading, desktop pagination, canonical project/repository/commit links, cross-channel discussion discovery, Nostr assignment/unassignment in SDK/CLI/desktop, causal authorization/state projection, and channel-first UI guardrails.
• Added RED/GREEN Rust, desktop, SDK, CLI, and Tauri tests. Passed pnpm --filter buzz check, pnpm --filter buzz typecheck, pnpm --filter buzz test (5,532 passed, 1 skipped), just check-compile, Tauri cargo check --all-targets, targeted assignment/tree tests, and exact-commit E2E (4/4 headless and 4/4 headed) at 17ec8d5.
• just test-unit reports four unrelated failures reproduced identically on clean main: three stale buzz-cli command-inventory assertions and one stale buzz-db migration-count assertion.
• Full-screen before/after screenshots are embedded in the PR body and hosted at immutable commit 959d7772ff1f346faf1eed70cf9395a6434205b1. Local evidence: /home/ubuntu/evidence/issue-270/before/, /home/ubuntu/evidence/issue-270/after/, /home/ubuntu/evidence/issue-270/pr-screenshots/, /home/ubuntu/evidence/issue-270/*.log, and /home/ubuntu/evidence/issue-270/after/issue-270-pr315-recording.mp4.
• CI showed the expected parent-controlled cancellation (NuncioCrew Gate failed because CI Policy was cancelled); it was not retriggered or modified.

IN PROGRESS - what is half-done, which files, what state it is in

• Nothing. The branch is clean, signed, pushed, and the implementation/evidence are complete.

TODO / NEXT - remaining steps for whoever picks this up, known risks, conflicts expected

• Parent session should serialize/re-run CI when this PR reaches the merge queue, resolve any sibling upstream-sync conflicts, and merge only after its policy gates pass.
• Optional follow-up outside upstream(sync): Projects engine — complete repo trees + v3 backend (#5102, #5792) #270: repair the two pre-existing project E2E specs that navigate to /projects instead of the hash route /#/projects, and refresh the stale clean-main unit-test inventory/migration baselines.
• Conflict risk is concentrated in Projects UI/model files shared with sibling Buzz 0.5.18 sync PRs; preserve the channel-first sidebar and reject Projects rail/top-level Projects/Workbench chrome during resolution.

[cursor]

Post-rebase evidence (after 165a3b81)

Rebased devin/issue-270-projects-engine-v3 onto current origin/main (165a3b81, #316 / #288 + #317). Fast-forwarded 13 commits with no conflicts. Head: 554b2fa7e. Channel-first sidebar preserved — no Projects rail, top-level Projects chrome, or Workbench destination.

Channel-first sidebar (no Projects rail)

Inbox + channels + DMs. Exclusive repo binding on #engineering does not create a Projects folder or Workbench item.

Project repository tree

Canonical tab=files deep link auto-expands plumbing. Files tab shows the tracked tree (crates/, desktop/, README.md) with remote/local and branch controls.

Screen recording

Channel-first home → Projects repositories → Files tree after rebase.

https://raw.githubusercontent.com/Nuncio-hq/crew/a1ab9cb5f41c59086eda5a2e9919cd9166eab620/pr-315--post-rebase-recording.mp4