policy: Bun is tier 1, Deno is being removed — correct local CLAUDE.md - #54
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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NOT FOLDED IN: "Fallback: Nix (flake.nix)" is stale (Guix superseded Nix per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.
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Up to standards ✅🟢 Issues
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Pull Request Overview
This PR establishes Bun as the Tier 1 JavaScript/TypeScript runtime and package manager, effectively replacing Deno. While the core transitions are implemented, the document contains conflicting instructions for AI agents. Specifically, one section promotes direct TypeScript execution via Bun, while a subsequent enforcement rule strictly prohibits new TypeScript files.
There is also a discrepancy between the PR's stated intent to cleanup 'ReScript' references and the actual code, which still lists 'TypeScript'. To ensure deterministic deployments, a suggestion has been made to include the --frozen-lockfile flag in production commands. Finally, Deno should be explicitly moved to the banned list to prevent legacy fallback behavior.
About this PR
- The PR description mentions repairing 'blanking scars from the ReScript purge' by updating lines 44 and 67, but the current diff shows these lines still reference 'TypeScript'. If the intent was to transition these to 'ReScript', the changes are missing.
Test suggestions
- Verify Bun is listed as Tier 1 in the ALLOWED languages/tools table.
- Verify Deno has been removed as a replacement in the BANNED table.
- Verify Enforcement Rules 2 and 3 specify Bun and package.json requirements.
- Verify the Package Management section lists Bun as the JS dependency tool.
Low confidence findings
- There is a terminology discrepancy: line 27 notes that package manifests are 'expected', whereas Enforcement Rule 2 (line 68) states they are 'REQUIRED'. It is recommended to use 'REQUIRED' in both locations to avoid ambiguity.
TIP Improve review quality by adding custom instructions
TIP How was this review? Give us feedback
| |---------------|----------|-------| | ||
| | **AffineScript** | Primary application code | Compiles to JS, type-safe | | ||
| | **Deno** | Runtime & package management | Replaces Node/npm/bun | | ||
| | **Bun** | JS/TS runtime & package management (tier 1) | Default for all new work. Executes `.ts` directly, no build step. Uses an npm-compatible `package.json` plus `bun.lock` — both are expected, not anti-patterns. | |
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🟡 MEDIUM RISK
This description contradicts the broader language policy. Since Rule 1 (line 67) bans new TypeScript files and AffineScript requires compilation to JS, highlighting direct .ts execution and a 'no build step' workflow may mislead the AI. Consider clarifying that Bun is used to execute the compiled JavaScript output from AffineScript rather than raw TypeScript.
| 2. **No package.json - use deno.json deps** - Use deno.json imports | ||
| 3. **No node_modules in production** - Deno caches deps automatically | ||
| 2. **Use `package.json` + `bun.lock` for JS runtime deps** - Bun is npm-compatible; a manifest is REQUIRED | ||
| 3. **`bun install --production` for production deps** - resolved from `package.json`, pinned via `bun.lock` |
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🟡 MEDIUM RISK
Suggestion: To ensure builds are deterministic and the lockfile is not mutated in production environments, include the --frozen-lockfile flag.
| 3. **`bun install --production` for production deps** - resolved from `package.json`, pinned via `bun.lock` | |
| 3. **`bun install --production --frozen-lockfile`** for production deps - resolved from `package.json`, pinned via `bun.lock` |
| | pnpm/yarn | Deno | | ||
| | Node.js | Bun | | ||
| | npm | Bun | | ||
| | pnpm/yarn | Bun | |
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⚪ LOW RISK
Suggestion: Deno has been removed from the 'ALLOWED' list but is not yet present in the 'BANNED' list. To ensure full compliance with the new Bun-only policy and prevent AI agents from defaulting to previous Deno-centric instructions, Deno should be explicitly listed as banned.
| | pnpm/yarn | Bun | | |
| pnpm/yarn | Bun | | |
| Deno | Bun | |
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).
1 participant
Owner ruling, 2026-08-26:
This repo's
.claude/CLAUDE.mdis what an agent reads first. Correctinghyperpolymath/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.
| Bun | Deno |row removedpackage.json+bun.lock)bun install --productionreplaces the node_modules rulebunx --no-install --bunOnly where cannot→ Only where AffineScript cannotReview feedback addressed
.tsdirectly" inside a file that bans TypeScript. Owner ruling: TypeScript should not exist at all — so every.tsreference is gone from the row, including JS/TS in its label. It now reads JS runtime, running compiled ESM/JS.bunx(coderabbitai, Security & Privacy): a barebunx <tool>can fetch a package outsidebun.lockand can start Node via a shebang. Guidance now requires a declared devDependency plusbunx --no-install --bun.Not taken: "a npm-compatible" (LanguageTool is wrong — "an" is correct before a vowel sound); "
--frozen-lockfileis 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).