feat(ai): support unlabeled batch fetch in prompts getAll

[jurajmajerik]

Problem

prompts.getAll() requires a label, so there is no way to batch-fetch the latest version of every prompt. The server treats any label value as a filter, so no value a caller could pass produces the unlabeled listing that plain get(name) resolves to. Requested by a customer; mirrors PostHog/posthog-python#966.

Changes

• label on getAll is now optional. Without it, the request omits the label param and returns the latest version of every prompt, matching plain get(name).
• Unlabeled results are cached under the undefined cache key that plain get(name) reads, so those calls become cache hits.
• The label-resolution checks (absent/moved rows) only run when a label was requested.

Release info Sub-libraries affected

Libraries affected

• @posthog/ai

Checklist

• Tests for new code
• Accounted for the impact of any changes across different platforms
• Accounted for backwards compatibility of any changes (no breaking changes!)
• Took care not to unnecessarily increase the bundle size

If releasing new changes

• Changeset file added (.changeset/prompts-get-all-unlabeled.md, minor)

🤖 Agent context

Autonomy: Human-driven (agent-assisted)

• Written with Claude Code (model: claude-fable-5), driven by @jurajmajerik.
• One test added to the getAll() block: an unlabeled fetch must omit the label param from the URL, accept rows without labels, and seed the unlabeled get() cache. All 69 prompt tests pass; check-types, oxlint and oxfmt clean.

[greptile-apps]

Prompt To Fix All With AI

### Issue 1
packages/ai/src/prompts.ts:106-109
**Misplaced label-state documentation**

The new helper separates `rowLabelState` from the documentation that describes it, making that documentation appear to describe `promptListReference` instead. Move the helper above the label-state documentation, or move the documentation directly above `rowLabelState`, so future changes do not misread the helper's behavior.

---

For each issue above, determine whether it is valid and should be fixed. If so, fix it directly.

_{Reviews (1): Last reviewed commit: "feat(ai): support unlabeled batch fetch ..." | Re-trigger Greptile}

[greptile-apps]

Misplaced label-state documentation

The new helper separates rowLabelState from the documentation that describes it, making that documentation appear to describe promptListReference instead. Move the helper above the label-state documentation, or move the documentation directly above rowLabelState, so future changes do not misread the helper's behavior.

Prompt To Fix With AI

This is a comment left during a code review.
Path: packages/ai/src/prompts.ts
Line: 106-109

Comment:
**Misplaced label-state documentation**

The new helper separates `rowLabelState` from the documentation that describes it, making that documentation appear to describe `promptListReference` instead. Move the helper above the label-state documentation, or move the documentation directly above `rowLabelState`, so future changes do not misread the helper's behavior.

---

For each issue above, determine whether it is valid and should be fixed. If so, fix it directly.

Note: If this suggestion doesn't match your team's coding style, reply to this and let me know. I'll remember it for next time!

[jurajmajerik]

fixed in 3e1b4f6

[marandaneto]

The code looks good; no qualifying findings. Verdict: correct.