Files
filip131311 f1331cf80d fix(installer): unbreak pnpm local installs + stop self-fulfilling editor detection (#501)
## Problem

Field report (pnpm setup): `npx @swmansion/argent init --local`

- ✅ "updated argent 14→15", ✅ created `.mcp.json` + `skills-lock.json`
- 🔴 did **not** add argent to `package.json`
- 🔴 re-running the same command → `Local install failed.` + advice to
run `pnpm add -D ...` manually
- 🔴 init "persistently detects" Cursor and Codex on a fresh machine that
never had them

## Root causes (each reproduced; confirmed against installer telemetry)

1. **Stale-binary hijack** — bare `npx @swmansion/argent` prefers an
existing **global install** over the registry. A global 0.14 predates
`--local` and `parseInitArgs` silently ignored unknown flags, so run 1
was a plain global-mode 0.14 init: it offered the 14→15 update, wrote
mcp/skills files, and never touched package.json. That's symptoms 1–3 in
one.
2. **pm detection missed pnpm's modern markers** — `pnpm init` (pnpm
10/11) writes only `devEngines.packageManager`, and no lockfile exists
before the first install. Detection fell back to npm, whose own
devEngines gate instantly rejects the install (`EBADDEVENGINES`, ~250
ms). This is the 221–537 ms `INSTALL_LOCAL_PACKAGE_FAILED` cluster in
PostHog (8 events / 7 users last week).
3. **Missing pm binary** (cloned pnpm repo, machine has only npm)
surfaced as raw `spawn pnpm ENOENT` plus manual advice that fails
identically in the user's shell.
4. **Self-fulfilling detection** — Cursor/Codex `detect()` keyed on bare
`~/.cursor` / `~/.codex` dirs, which argent itself creates (an `init -y`
with nothing detected configures *all* editors; allowlist/skills writes
too).

Telemetry also shows a ~19 s failure shape where an identical manual
retry succeeds (transient registry / pnpm first-run state errors).

## Fixes

- **Init flag parsing stays lenient**: unknown flags remain silently
ignored — aborting on them could break existing scripts/setups that pass
flags an installed version doesn't know. The parser now also accepts the
`--from=path` spelling, ignores a dangling `--from`, and keeps
first-`--from`-wins semantics. The stale-binary hijack is addressed on
the docs side (`@latest` in the README) rather than by a hard abort.
- **`detectProjectPackageManager`** honors `devEngines.packageManager`
(object + array forms) and `pnpm-workspace.yaml` — the latter ranked
*below* real lockfiles so a stray file left by a pnpm→yarn migration
can't outrank `yarn.lock`.
- **Missing-binary failures** name the real problem ("This project uses
pnpm, but the pnpm command was not found on PATH" + corepack hint).
Windows detected via cmd.exe's "is not recognized" text, since `shell:
true` never ENOENTs there. Other pm failures **retry once**.
- **Editor detection requires real evidence**: a `.cursor`/`.codex` dir
counts only if it holds something beyond argent's own artifacts (argent
mcp.json entry, `permissions.json` allowlist, managed
`developer_instructions`, bundled rules/agents/skills). Corrupt,
unparseable, or empty content conservatively counts as user evidence.
The stale-config sweep now scans **all** adapters so dead entries in
no-longer-detected dirs still get pruned.
- **README**: recommend `npx @swmansion/argent@latest init` and a `pnpm
dlx` alternative (npm's devEngines gate blocks the *outer* npx in fresh
pnpm-init projects).

## Testing

- Live-tested a packed tgz under the exact repro conditions: fresh
pnpm-init project A/B (published 0.15.0 fails EBADDEVENGINES in ~250 ms;
this branch installs the devDependency correctly), missing-pnpm message,
flag-parsing edges (`--from=` spelling, dangling `--from`),
retry-on-transient-failure (flaky pm shim), detection flips (argent-only
dirs incl. permissions.json → not detected;
`argv.json`/`sessions/`/corrupt configs → detected), plus regressions:
npm project local init, global-mode `init -y`, recovery of the broken
post-0.14 state.
- High-effort multi-agent code review of the diff surfaced 10 confirmed
defects in the first iteration (permissions.json not whitelisted,
corrupt configs misclassified as argent-only, pnpm-workspace.yaml
outranking yarn.lock, `--from=` rejected, Windows ENOENT never firing,
stale-sweep interaction, …) — all fixed and re-verified.
- 493 argent-installer + 87 registry unit tests green (new suites for
flag parsing, devEngines/workspace detection, detection evidence).

🤖 Generated with [Claude Code](https://claude.com/claude-code)
2026-07-15 15:37:54 +02:00
..
2026-06-19 18:22:34 +02:00