[daehyeon-mun]

Prompt links now open a draft in T3 Code. A plain prompt opens No project; repository and pull request links find the matching project or existing thread across connected environments. Hidden characters are removed with a persistent warning, existing drafts require Replace draft, and a new pull request worktree requires Check out before any setup script runs. Links never send messages automatically.

The palette offers Copy prompt link and Copy prompt link with repo and model; user messages have a Copy prompt link action. Packaged builds declare t3code with distribution_only: true and /open?u=%s, using the separately adopted framework support. Development and lane bundles register no scheme. Lane verification enters the app route directly.

Ported upstream 5fe7568e87 (pingdotgg/t3code#18454), matching reference 9c161462c9. Shared parsing, hidden-character rules, repository/model selection, draft replacement text and checkout choices follow the upstream implementation; the app reuses its existing connection fleet, project cloning and PR preparation operations.

Acceptance	Result	Proof
Plain, repository and thread links prepare an unsent draft	Native plain-link drive passed; repository/thread routing regressions pass	Unsent draft, tests
Hidden characters and existing drafts	Native drive asserted exact sanitized text and empty thread ID; warning/replacement tests pass	Draft pair, tests
Existing PR thread and explicit new PR checkout	Handler tests pass; no preparation before confirmation	Handler tests
Missing repository clone / No project choices	Native choices render above empty-home landing; clone requires explicit action	Repository pair
Copy links from palette and user messages	Native-clipboard adapter tests pass	Copy tests
Packaged-only handler, no lane scheme	Approved declaration; final Info.plist has neither handler nor URL scheme	Manifest and final native bundle inspection

Native qualification at c5f5ed247; final source merges integration de2558b58b (including #754) at 673945745:

• Full Bun suite: 5,120 passed, zero failures, 123,043 assertions across 356 files. The focused prompt tests: 26 passed, 111 assertions.
• Frozen install, generator, strict app TypeScript, full optimized Contract preflight (32.6 MB plan), caps and boot passed.
• Final native bundle passed. Its Info.plist contains neither CFBundleURLTypes nor ExactProtocolHandlers.
• After integrating the current target: 763 affected tests passed (3,250 assertions across 34 files), strict TypeScript, full Contract preflight (35,525,218 bytes), caps and whitespace checks passed. No new native bake was needed for that app-task merge; final combined native qualification follows integration.
• Matched native before/after captures passed, including missing-repository choices above the landing and a sanitized, unsent draft. Both fixtures use isolated lane homes and an explicit Git ceiling so the real server offers its scratch workspace. No OS scheme is registered or invoked.

Known differences: none identified in the scoped behavior. The scheme-registration framework change was reviewed separately in #747 and is already adopted by the target branch; this PR changes app files only.

Prepared with Codex; continues work begun in the prior Claude session.

[daehyeon-mun]

Matched native BEFORE/AFTER: incoming missing-repository choices and an unsent sanitized prompt. Both runs use isolated lane homes and an explicit Git ceiling; the t3code OS scheme was neither registered nor invoked.