chore: collapse literal Object.freeze pyramids into deepFreeze

[ScriptedAlchemy]

Summary

• Collapse nested Object.freeze stacks on fresh literals to the existing deepFreeze helper (packages/agent-bundle/src/core/freeze.ts) plus a Workbench-local copy (packages/workbench/src/freeze.ts). Public API stays plain objects; Effect immutables stay internal.
• Leave single shallow freezes and any freeze that shares a mutable reference (detached snapshot / capability-table callers). Do not weaken those contracts.
• Skip active-lane files: src/install/, src/host-contracts/, create-agent-bundle, .github/workflows, and Workbench document-stage / runtime-model surfaces.

Test plan

• Unit pool for agent-bundle, rsc-runtime, workbench (2265 passed)
• Frozen-semantics parity: capability tables, agent-document, state kernel, detached runtime snapshots (83 passed)
• pnpm typecheck
• pnpm lint
• CI green, then merge

No changeset: internal readability refactor, no public behavior change.

[changeset-bot]

⚠️ No Changeset found

Latest commit: fa70c9b

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR

[chatgpt-codex-connector]

Codex Review Summary

This comment shows the latest Codex review activity on this pull request.

Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-09-01T23:38:27.336843Z	9c04cb6	PR opened

ℹ️ About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review" or "@codex security review".

Codex reacts with 👀 while any review is running, comments if it has suggestions, and reacts with 👍 once all reviews finish with no findings.

[pkg-pr-new]

npm i https://pkg.pr.new/ScriptedAlchemy/agent-bundle@238

npm i https://pkg.pr.new/ScriptedAlchemy/agent-bundle/create-agent-bundle@238

npm i https://pkg.pr.new/ScriptedAlchemy/agent-bundle/@agent-bundle/runtime@238

commit: fa70c9b