chore: remove old files replaced by the new shape

[gewenyu99]

Phase 2 of Release C (#1320), PR 10 of 16, after #1385. Deletions only. PRs 1 to 14 of this phase split one change into reviewable pieces and compile only as a stack: review them one by one, then land the whole phase together.

Problem

#1376 to #1385 add the new code beside the old, so the old modules are still in the tree. This PR removes them. The files the new code keeps, such as wizard-session.ts, the runners and wizard-abort.ts, moved whole in #1375, so they are not here.

Changes

Deletions only: 29 files deleted whole, 4,050 lines. No file is edited.

• The old UI layer: src/ui (wizard-ui.ts, tui/ink-ui.ts, headless-ui.ts, agent-progress.ts, index.ts) and the old src/ui/tui/screen-registry.tsx and screen-sequences.ts.
• The old run path: src/programs/run-agent-legacy.ts, program-store.ts and authenticate.ts, src/agent/agent-runner.ts, src/programs/posthog-doctor/index.ts and web-analytics-doctor/steps.ts.
• Old steps and barrels: src/steps (index.ts, run-prettier.ts, add-or-update-environment-variables.ts), the re-export files src/programs/detection/index.ts and src/programs/task-stream/index.ts, src/lib/helper-functions.ts, and mcp-role-prompts.copy.json.
• Tests of the deleted code: run-agent-legacy.test.ts, program-store.test.ts, mint-recovery.test.ts, headless-ui.test.ts, agent-progress.test.ts, and post-auth-gates.test.ts and its snapshot. The new code's tests land in test: tests for the agent and shared layers #1387 to test: tests for the hosts, tools and cli #1390.
• Also scripts/check-screens.tsx and .prettierignore, whose only entry is a path under src/lib.

Test plan

• This tree does not compile alone. On the top of the stack (docs: bring docs, readmes and skills in line with the layers #1392): pnpm typecheck 0 errors, pnpm lint 0 errors, 3,515 tests pass in 236 files, pnpm build ok.

Created with PostHog Desktop

[github-actions]

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Results will be posted here when complete.

[johncwaters]

Note

Automated review. Not written by a human.

• docs/runbooks/warlock-kill-switch.md:66: this PR deletes src/agent/agent-runner.ts, but the kill-switch runbook still links to it as the place the flag is read at run start, and the link survives to the top of the stack. Point it at src/programs/wizard-flags.ts (which now calls getAllFlagsForWizard()) or at src/agent/runner/.

[edwinyjlim]

Review of #1386 at 1cda88f1. Items outside this PR's diff lines:

[P3] The PR body's inventory is wrong
PR description

Partly fixed since the last push. The body says 29 files and 4,050 lines; the commit deletes 4,061.

Suggested fix: Change the deletion count to 4,061.

[P3] Two callers of deleted files are left dangling and fixed three and four PRs later
package.json:149 · scripts/tui-host.no-jest.ts:26 · scripts/tui-host.no-jest.ts:32

The body says "no file is edited", so a reader cannot tell that pnpm screens:check and the TUI host script are handled. scripts/README.md:4 also names check-screens.tsx until #1392.

Suggested fix: Fold the one-line package.json removal into this PR, and note in the body where the other two land.

[P3] @ui and @steps aliases outlive their targets
.eslintrc.cjs:68 · .eslintrc.cjs:80-81 · tsconfig.build.json:41-44 · README.md:534

Suggested fix: Remove the alias lines here or list them in the body as handled downstream.

---

Drafted with Claude Code from a review of the whole Release C stack, re-verified at the stack tip 2e31e438. Line numbers are at this PR's head.

[gewenyu99]

Folded into #1378 so the phase builds green PR by PR. This PR keeps its review; the code lands through #1378.