fix(cursor-env): prefetch-only install, persist PATH

[rmems]

User description

Summary

Cloud Agent environment builds were failing when main had red CI because .cursor/install.sh ran fmt, clippy, and full test execution during snapshot install. Install now only fetches, compiles, and builds test binaries without running tests.

Changes

• .cursor/install.sh: Keep Rust 1.99.0 check; run cargo fetch --locked, cargo build --all-features --locked, and cargo test --no-run --all-features --locked. Removed fmt, clippy, and test-execution gates.
• .cursor/Dockerfile: Persist toolchain on PATH via /etc/profile.d/cargo.sh, symlink /usr/local/cargo/bin/* into /usr/local/bin, and chown /usr/local/cargo and /usr/local/rustup to ubuntu.

Validation

• bash -n .cursor/install.sh — pass
• jq . .cursor/environment.json — pass
• JSON Schema validation against https://cursor.com/schemas/environment.schema.json — pass
• docker build — not run (Docker unavailable in this VM)

Cited by: Cloud Env Steward (Grok Bot)

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Summary by cubic

Fixes Cloud Agent environment builds that failed when main had red CI because .cursor/install.sh ran fmt, clippy, and the full test suite during snapshot install. Install now only fetches, compiles, and builds test binaries without executing them.

• .cursor/install.sh keeps the Rust 1.99.0 check but replaces fmt, clippy, and test execution with cargo fetch --locked, cargo build --all-features --locked, and cargo test --no-run --all-features --locked.
• .cursor/Dockerfile redeclares the RUST_VERSION build arg after FROM, persists the toolchain on PATH via /etc/profile.d/cargo.sh, symlinks cargo binaries into /usr/local/bin, and chowns /usr/local/cargo and /usr/local/rustup to the ubuntu user.

^{Written for commit 0fd65c6. Summary will update on new commits.}

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CodeAnt-AI Description

Avoid CI checks blocking Cloud Agent setup

What Changed

• Cloud Agent setup downloads dependencies and compiles the project without running formatting, lint, or test checks.
• Rust commands remain available to the Ubuntu user after login.

Impact

✅ Fewer Cloud Agent setup failures
✅ Shorter Cloud Agent setup
✅ Rust commands available in agent sessions

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Summary by CodeRabbit

• Chores
  • Rust development environments now have Cargo and Rustup configured and available from the command line.
  • The setup process builds the project with all features enabled and compiles tests without running them. Formatting checks, Clippy, and test execution are no longer part of this setup step.

[codeant-ai]

🤖 CodeAnt AI — Review Status

Status	Commit	Started (UTC)	Finished (UTC)
✅ Reviewed your PR	afe69c2	Oct 05, 2026 · 20:32	20:34

[codeant-ai]

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Important

• 🔍 Trigger review

This repository does not receive automatic reviews because it has fewer than 10 stars.

⚙️ Run configuration

• Configuration used: Repository: rmems/engram-parser/.coderabbit.yaml
• Review profile: CHILL
• Plan: Advanced
• Run ID: b9939f8c-2b61-4d66-a326-8d9925be13ee

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

• Configuration used: Repository: rmems/engram-parser/.coderabbit.yaml
• Review profile: CHILL
• Plan: Advanced
• Run ID: b7e8cb7c-88af-46f3-a2b2-403402b28e21

📥 Commits

Reviewing files that changed from the base of the PR and between f02c935 and afe69c2.

📒 Files selected for processing (2)

• .cursor/Dockerfile
• .cursor/install.sh

Included review availability: This review used your included allowance. Your plan provides up to 1 included review per hour; 0 remain after this review.

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📝 Walkthrough

Walkthrough

The development container now configures Cargo and Rustup paths. Its install script runs a locked all-features build and compiles all-features tests without executing them.

Changes

Rust development environment

Layer / File(s)	Summary
Configure Cargo and Rustup environment .cursor/Dockerfile	The Dockerfile sets CARGO_HOME and RUSTUP_HOME, adds the Rust toolchain bin directory to PATH, writes environment exports to /etc/profile.d/cargo.sh, links Cargo binaries under /usr/local/bin, and changes ownership of the Cargo and Rustup directories. The profile script uses the Rust 1.99.0 toolchain path.
Build and compile tests .cursor/install.sh	The install script replaces formatting and Clippy checks and executed all-features tests with a locked all-features build and test compilation without execution.

Priority: ⬇️ Low

Estimated code review effort: 2 (Simple) | ~10 minutes

Change: Bug fix

Merge Risk: ⚪ Minimal · up to afe69

The configured environment retains access to its Rust commands, and CI continues to run the checks omitted from setup. No actionable merge-blocking risk is established.

Architecture Summary

Architecture risk: 🔵 Low · up to afe69

The changed surface does not map to a changed system, dependency edge, entrypoint, or external dependency.

Changed systems: None identified.

Architecture concerns
No architecture-level concerns identified.

Review details

Before / after behavior

• observed — Modified behavior in .cursor/Dockerfile: The environment now sets CARGO_HOME and RUSTUP_HOME and includes the Rust toolchain bin directory in PATH; previously, only the locale variable was added in this span.
• observed — Modified behavior in .cursor/Dockerfile: A build step now writes Cargo and Rustup environment exports to /etc/profile.d/cargo.sh, with the toolchain path hardcoded to Rust 1.99.0. It then makes the script readable, symlinks Cargo binaries into /usr/local/bin, and assigns the Cargo and Rustup directories to ubuntu:ubuntu.
• observed — Modified behavior in .cursor/install.sh: The comment now describes a prefetch-and-compile workflow instead of matching CI formatting, Clippy, and test gates.
• observed — Modified behavior in .cursor/install.sh: The script replaces formatting and Clippy checks and executed all-features tests with a locked all-features build and compilation of all-features tests without running them.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly summarizes the main changes: the Cursor install script now prefetches and compiles without running checks, and the environment persists the Rust toolchain path.
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 1…
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.

✨ Finishing Touches 💡 1

📝 Generate docstrings

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🛠️ Fix failing CI checks 💡

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[codeant-ai]

CodeAnt Nitpicks

1 code suggestion

1. --all-features excludes tests gated by not(feature = "safetensors"), so the default-feature test binaries are not prebuilt and default test runs still require compilation.

Incomplete implementation · .cursor/install.sh:12-13

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Overview

Incremental review of commit 0fd65c6 (since previous review at afe69c2). The single changed file, .cursor/Dockerfile, correctly resolves the previously reported ARG-scoping defect:

• ARG RUST_VERSION redeclared after FROM (line 8) inherits the global default or --build-arg value, so ENV PATH (line 15) now expands to the real toolchain directory in non-login shells.
• The /etc/profile.d/cargo.sh PATH line (line 34) uses a double-quoted printf argument: ${RUST_VERSION} expands at build time and \$PATH is preserved literally for runtime shells. This is the correct expansion strategy.
• Previous findings (hardcoded 1.99.0 in PATH, empty RUST_VERSION in ENV) are fixed in this commit; no new issues found on changed lines.
• .cursor/install.sh is unchanged in this increment and had no prior findings.

Files Reviewed (1 file)

• .cursor/Dockerfile

Previous Review Summary (commit afe69c2)

Current summary above is authoritative. Previous snapshots are kept for context only.

Previous review (commit afe69c2)

Status: No Issues Found | Recommendation: Merge

Files Reviewed (2 files)

• .cursor/Dockerfile
• .cursor/install.sh

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_{Reviewed by free · Input: 54.7K · Output: 10.2K · Cached: 152.3K}

_{Review guidance: REVIEW.md from base branch main (truncated)}

[linear-code]

RM-2026