(MOT-3898) feat: create new files in the current folder by default

[ytallo]

New files created without an explicit folder now land in the session's working directory. The path resolution already anchored scoped relative paths there — but every model-facing instruction still pointed at the primary jail root, so agents kept writing files into the worker install path. This fixes the instructions and contract text end to end.

Harness

• The working-directory system-prompt aid now instructs instead of merely stating: "Your working directory is {dir}. Create new files there by default — relative paths resolve against it; only write elsewhere when the user names another location."
• prompts/default.txt and prompts/cli.txt: the coder routing paragraph gains the same where-new-files-go sentence.

Provider prompts

• anthropic / openai / openai-codex / xai identity prompts: the code-file routing clause now says new files land in the working directory by default.

Shell

• All coder::* function descriptions and the create/move/delete path field docs said "relative to the primary allowed root" — wrong for scoped sessions, where relatives anchor at the session root. Reworded across create/read/search/list-folder/tree/update/move/delete plus the shell::exec cwd doc (omitted cwd runs in the session working directory when scoped).
• coder::info is now session-aware: it accepts the harness-stamped scope (schema-hidden like its siblings) and reports session_root, so "where may I write?" answers with the session anchor rather than only the jail root.
• Path safety unchanged: containment (C215/C218), denylist, and grants behave exactly as before. Schema goldens regenerated; fs_scope remains absent from every published schema.

Tests

• Shell: 1294 pass, including new session_root_reflects_scope (scoped → canonical echo, unscoped → none, outside-roots → none).
• Harness: 178 pass with the updated aid-line assertions.

Fixes MOT-3898
Refs MOT-3897

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Actions	Updated (UTC)
workers	Ready	Preview, Comment	Jul 7, 2026 7:56pm
workers-tech-spec	Ready	Preview, Comment	Jul 7, 2026 7:56pm

[coderabbitai]

Warning

Review limit reached

@ytallo, you've reached your PR review limit, so we couldn't start this review.

Next review available in: 59 minutes

Enable usage-based reviews in Billing to review now. Otherwise, wait until the next included review is available.
You're only billed for reviews past your plan's rate limits ($0.25/file).

How can I continue?

After more reviews become available, a review can be triggered using the @coderabbitai review command as a PR comment. Alternatively, push new commits to this PR.

To avoid repeated limits, reduce automatic review volume by pausing incremental auto-reviews earlier, using label-based review opt-in, excluding WIP or generated PR titles, or requesting reviews manually when the PR is ready. If your team needs uninterrupted high-volume reviews, an organization admin can enable usage-based reviews.

How do review limits work?

CodeRabbit enforces per-developer PR review limits for each organization. Most developers receive the normal plan review availability.

For paid Pro and Pro+ PR reviews, CodeRabbit uses adaptive limits for sustained high-volume activity. When a developer's recent PR review activity reaches the 95th percentile or higher among CodeRabbit users, additional reviews become available more gradually as earlier reviews age out of the rolling window.

Please refer docs for additional details.

Review details

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 67d664cc-55fe-4e0a-894d-c7db9de8f4ba

📥 Commits

Reviewing files that changed from the base of the PR and between 9aeb2e1 and 2bda272.

📒 Files selected for processing (28)

• harness/prompts/cli.txt
• harness/prompts/default.txt
• harness/src/turn_loop.rs
• provider-anthropic/prompts/identity.txt
• provider-openai-codex/prompts/identity.txt
• provider-openai/prompts/identity.txt
• provider-xai/prompts/identity.txt
• shell/src/code/functions/create_file.rs
• shell/src/code/functions/delete_file.rs
• shell/src/code/functions/info.rs
• shell/src/code/functions/list_folder.rs
• shell/src/code/functions/mod.rs
• shell/src/code/functions/move_file.rs
• shell/src/code/functions/read_file.rs
• shell/src/code/functions/search.rs
• shell/src/code/functions/tree.rs
• shell/src/code/functions/update_file.rs
• shell/src/functions/types.rs
• shell/tests/common/world.rs
• shell/tests/golden/schemas/coder.create-file.json
• shell/tests/golden/schemas/coder.delete-file.json
• shell/tests/golden/schemas/coder.info.json
• shell/tests/golden/schemas/coder.list-folder.json
• shell/tests/golden/schemas/coder.move.json
• shell/tests/golden/schemas/coder.read-file.json
• shell/tests/golden/schemas/coder.search.json
• shell/tests/golden/schemas/coder.tree.json
• shell/tests/golden/schemas/coder.update-file.json

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch feat/new-files-current-folder

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands.}

[github-actions]

skill-check — worker

0 verified, 38 skipped (no docs/).

Layer	Result
structure	✓
vale	✓
ai	✓
render	✓

Four for four. Nicely done.