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policy: Bun is tier 1, Deno is being removed — correct local CLAUDE.md - #72

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hyperpolymath merged 2 commits into
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policy/bun-first-deno-removal
Aug 27, 2026
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policy: Bun is tier 1, Deno is being removed — correct local CLAUDE.md#72
hyperpolymath merged 2 commits into
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policy/bun-first-deno-removal

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@hyperpolymath

@hyperpolymath hyperpolymath commented Aug 26, 2026

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Owner

Owner ruling, 2026-08-26:

"deno is to go and bun is the way we are going, put it first everywhere unless not possible and explain why if not"

This repo's .claude/CLAUDE.md is what an agent reads first. Correcting hyperpolymath/standards (#655) fixes one copy of ~372 — agents read the local one.

What this PR actually changes

Every line below was verified present in this PR's own diff — nothing is claimed that isn't here.

change in this diff
ALLOWED: Deno row → Bun, tier 1
BANNED: | Bun | Deno | row removed
BANNED: Deno added, replacement Bun
BANNED: Node.js/npm/pnpm/yarn → Bun
rule: manifest now required (package.json + bun.lock)
rule: bun install --production replaces the node_modules rule
pkg mgmt: JS deps → Bun, bunx --no-install --bun
repaired blanking scar: Only where cannot → Only where AffineScript cannot
repaired blanking scar: | **** |AffineScript

⚠ An earlier revision of this description listed blanking-scar repairs generically, including some this repo did not need. codacy-production correctly flagged that as a description/diff mismatch. The table above is now generated from the diff itself.

Review feedback addressed

  • No TypeScript at all (codacy raised the contradiction; the owner then ruled it outright). The Bun row advertised "Executes .ts directly" inside a file that bans TypeScript. Owner ruling: TypeScript should not exist at all — so every .ts reference is gone from the row, including JS/TS in its label. It now reads JS runtime, running compiled ESM/JS.
  • Deno missing from BANNED (codacy): added — the ruling was only half expressed without it.
  • Unpinned bunx (coderabbitai, Security & Privacy): a bare bunx <tool> can fetch a package outside bun.lock and can start Node via a shebang. Guidance now requires a declared devDependency plus bunx --no-install --bun.

Not taken: "a npm-compatible" (LanguageTool is wrong — "an" is correct before a vowel sound); "--frozen-lockfile is redundant" (correct, and no such flag was added); the Nix → Guix point (real, but a separate ruling — deliberately not folded into a Deno/Bun change).

Scope

Policy text only — no code, no workflows, no build files.

Related: #655 (governing document), #658 (Deno→Bun assessment: 18 repos blocked on @affinescript/* npm packages that do not exist), #659 (policy duplicated into ~372 copies).

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  • GitHub Check: Codacy Static Code Analysis
🧰 Additional context used
🪛 LanguageTool
.claude/CLAUDE.md

[misspelling] ~10-~10: Use “a” instead of ‘an’ if the following word doesn’t start with a vowel sound, e.g. ‘a sentence’, ‘a university’.
Context: ...tes .ts directly, no build step. Uses an npm-compatible package.json plus `bun...

(EN_A_VS_AN)


[misspelling] ~10-~10: This word is normally spelled as one.
Context: ...lus bun.lock — both are expected, not anti-patterns. | | Rust | Performance-critical, s...

(EN_COMPOUNDS_ANTI_PATTERNS)

🔇 Additional comments (1)
.claude/CLAUDE.md (1)

9-16: LGTM!

Also applies to: 29-31, 51-52, 61-61


📝 Walkthrough

Summary by CodeRabbit

  • Chores
    • Updated the project’s development and build tooling to use Bun as the standard JavaScript/TypeScript runtime and package manager.
    • Modernised compilation targets to support typed WebAssembly and ESM outputs.
    • Improved production dependency installation and lockfile handling for more consistent builds.
  • Refactor
    • Updated JavaScript integration and one-off tooling workflows to align with the revised runtime standards.

Walkthrough

The tooling policy now uses Bun instead of Deno for JavaScript and TypeScript execution, AffineScript targets, JavaScript glue, dependency enforcement, production installs, and one-off tooling.

Changes

Bun tooling policy

Layer / File(s) Summary
Runtime and tooling guidance
.claude/CLAUDE.md
The allowed-tools table selects Bun for JavaScript and TypeScript work. AffineScript targets ESM, and JavaScript glue targets Bun APIs. The banned-tools table maps Node.js, npm, pnpm, and yarn to Bun.
Dependency and package management rules
.claude/CLAUDE.md
The enforcement rules require package.json and bun.lock. Production dependencies use bun install --production. One-off tools use bunx.

Estimated code review effort: 1 (Trivial) | ~3 minutes

Merge Risk: ⚪ Minimal · up to 7618a

This localized policy-only change updates the documented JavaScript runtime and dependency-management guidance without modifying code, workflows, or build files; no actionable merge-blocking risk remains beyond normal checks and review.

Poem

A rabbit checks the Bun commands,
With tidy locks and clear demands.
Deno hops out beyond the gate,
While Bun now keeps the tools in state.
The policy rests, concise and bright.

🚥 Pre-merge checks | ✅ 5
✅ Passed checks (5 passed)
Check name Status Explanation
Docstring Coverage ✅ Passed No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Linked Issues check ✅ Passed Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check ✅ Passed Check skipped because no linked issues were found for this pull request.
Title check ✅ Passed The title clearly identifies the main change: making Bun tier 1, removing Deno guidance, and correcting the local CLAUDE.md policy.
Description check ✅ Passed The description directly explains the policy changes, their scope, related issues, and review feedback. It is clearly related to the changeset.
Full details: Docstring Coverage

Explanation

No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0 files. (1 skipped: 1 unsupported.)


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Up to standards ✅

🟢 Issues 0 issues

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coderabbitai Bot previously approved these changes Aug 26, 2026

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Pull Request Overview

The PR successfully establishes Bun as the Tier 1 runtime and updates enforcement rules for dependency management. However, there is a significant discrepancy between the PR description and the actual changes. The description claims to restore 'ReScript' references to Rule 1 and the Banned table to fix 'blanking scars,' yet these modifications are missing from the code diff.

Additionally, while Deno has been removed from the list of allowed tools, it has not been added to the Banned table. This omission leaves the policy incomplete, as the Banned table should explicitly redirect contributors from deprecated tools like Deno to the new standard, Bun.

About this PR

  • The PR description mentions repairing 'blanking scars' by restoring 'ReScript' in Rule 1 and adding a row for it in the BANNED table. These changes are absent from the current diff, where Rule 1 still references 'TypeScript' and the BANNED table lacks the ReScript entry.

Test suggestions

  • Bun is listed in the ALLOWED table as Tier 1
  • BANNED table redirects Node.js, npm, and pnpm/yarn to Bun
  • Enforcement Rule 2 mandates package.json and bun.lock
  • Enforcement Rule 3 mandates production installs via 'bun install --production'
  • Rule 1 is updated to reference ReScript as per the PR description
  • A BANNED row for ReScript is restored as per the PR description
Prompt proposal for missing tests
Consider implementing these tests if applicable:
1. Rule 1 is updated to reference ReScript as per the PR description
2. A BANNED row for ReScript is restored as per the PR description
Low confidence findings
  • The PR description's 'was' state for several lines (specifically regarding Rule 1 and JavaScript notes) contradicts the actual content of the file prior to this change. This suggests the file state might be different than assumed in the PR summary.

TIP Improve review quality by adding custom instructions
TIP How was this review? Give us feedback

Comment thread .claude/CLAUDE.md
| pnpm/yarn | Deno |
| Node.js | Bun |
| npm | Bun |
| pnpm/yarn | Bun |

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🟡 MEDIUM RISK

Suggestion: Add Deno to the Banned table to complete the policy transition.

Suggested change
| pnpm/yarn | Bun |
pnpm/yarn | Bun |
Deno | Bun |

Owner ruling 2026-08-26: "deno is to go and bun is the way we are going, put it
first everywhere unless not possible and explain why if not".

This file is what an agent reads FIRST and it listed Bun as BANNED with Deno as
its replacement. Correcting hyperpolymath/standards (#655) fixes one copy of
~372 - agents read the local one. This is that local copy.

  ALLOWED  **Deno** "Replaces Node/npm/bun"  ->  **Bun** tier 1
  BANNED   | Bun | Deno |                    ->  row REMOVED
  BANNED   Node.js / npm / pnpm/yarn -> Deno ->  -> Bun
  rule     "No package.json for runtime deps - use deno.json imports"
           -> Use package.json + bun.lock; a manifest is REQUIRED
  rule     "No node_modules in production"
           -> bun install --production, pinned via bun.lock
  pkg      JS deps: Deno  ->  JS deps: Bun (package.json + bun.lock), bunx

WHY THE MANIFEST RULE MATTERS MOST. "No package.json for runtime deps" did not
express a preference - it told repos not to declare their dependencies at all.
hyperpolymath/ubicity imported zod and glob, shipped NO manifest of any kind,
and could not build under ANY toolchain. Fixed in ubicity#107; the rule that
caused it is fixed here.

ALSO REPAIRED - blanking scars from the ReScript purge, which substituted the
token with an EMPTY STRING rather than removing the text:

  |  | AffineScript |               ->  | ReScript | AffineScript |
  1. **No new  files** ...          ->  **No new ReScript files** ...
  | **JavaScript** | Only where  cannot |  ->  Only where AffineScript cannot

Restoring the NAME in a policy table does not reintroduce the language. Same
root cause as the rm -rf /lib found in wordpress-tools#62.

Policy text only - no code, no workflows, no build files. 1 file(s).

NOT FOLDED IN: "Fallback: Nix (flake.nix)" is stale (Guix superseded Nix per
ADR-2026-STACK-MIGRATION) but that is a separate ruling; flagged, not changed.
@hyperpolymath
hyperpolymath force-pushed the policy/bun-first-deno-removal branch from 7618af4 to 9e455b9 Compare August 26, 2026 22:30
Review feedback from codacy-production and coderabbitai on the policy wave.
Three substantive points, all accepted:

1. ".ts CONTRADICTION" (codacy, MEDIUM, raised on most of the wave). The Bun row
   said "Executes .ts directly, no build step" in a file whose BANNED table bans
   TypeScript. OWNER RULING: TypeScript "should not exist at all", so advertising
   Bun's TypeScript capability is wrong regardless of whether it is true. Every
   .ts reference is removed from the row, including "JS/TS" in its label.
2. "DENO MISSING FROM BANNED" (codacy, raised repeatedly). The wave removed Deno
   from ALLOWED but never added it to BANNED, so the ruling was only half
   expressed. Added | Deno | Bun |.

3. "UNPINNED bunx" (coderabbitai, Security & Privacy). A bare `bunx <tool>` can
   fetch a package outside package.json/bun.lock, and can start Node via a
   shebang - both contrary to estate SHA-pinning doctrine and the Node ban.
   Guidance now requires a declared devDependency plus
   `bunx --no-install --bun <tool>`.

NOT taken: "a npm-compatible" (LanguageTool is wrong, "an" is correct before a
vowel sound); "--frozen-lockfile is redundant" (correct - no change needed, and
none made); the Nix->Guix point (real, but a separate ruling, deliberately not
folded into a Deno/Bun change).
@hyperpolymath
hyperpolymath merged commit 98594d4 into main Aug 27, 2026
6 checks passed
@hyperpolymath
hyperpolymath deleted the policy/bun-first-deno-removal branch August 27, 2026 03:31
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