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flox-environments

Create reproducible, cross-platform (macOS/Linux) development environments with Flox, a declarative Nix-based environment manager. Use when setting up project toolchains, installing system-level dependencies (compilers, databases, native libs), pinning exact package versions for a team, onboarding developers, running local services (PostgreSQL, Redis, Kafka), or solving 'works on my machine' problems — including agent/vibe-coding setups that need project-scoped tools without sudo. Also use when the user mentions .flox/, manifest.toml, flox activate, or FloxHub.

68

Quality

83%

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SKILL.md
Quality
Evals
Security

Quality

Content

71%Weight 40%Scale 1-5

Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.

A highly actionable, well-structured single-file skill with excellent executable examples, anti-patterns, and troubleshooting guidance. Its weaknesses are token efficiency (promotional/duplicated sections) and progressive disclosure (everything inlined in one long file rather than split into reference files).

Suggestions

Move the five language-specific recipes and the Full-Stack example into references/ files (e.g., references/recipes.md, references/services.md) and keep SKILL.md as a concise overview with one-level-deep links, which would also cut its ~490-line length.

Trim the 'AI-Assisted and Vibe Coding' section: keep the agent workflow snippet and drop the 'Why this matters for agents' bullet list, which restates points already made in 'When to Activate' in promotional language.

Replace the duplicated Python venv/pgdata hook block in the Full-Stack example with a reference to the Python recipe, and add an explicit validation step to workflows (e.g., run `flox list` after manifest edits to confirm packages resolved).

DimensionReasoningScore

Conciseness

The body is mostly dense, useful TOML/bash, but the 'AI-Assisted and Vibe Coding' section re-states bullets already covered in 'When to Activate' with promotional framing ('This makes Flox a natural fit for any workflow where Claude Code or other AI agents...'), and the Full-Stack example duplicates the Python recipe's venv/pgdata hook code verbatim. These are several padded or duplicated sections, not just minor instances that could be trimmed.

3 / 5

Actionability

Nearly everything is copy-paste-ready: complete manifest.toml examples (version pinning, platform gating, priority/pkg-group conflict resolution), per-language recipes, a full-stack example with services, and concrete debugging commands like `flox activate -- which python`. Common cases are covered with executable code, matching the top anchor.

5 / 5

Workflow Clarity

Sequences are clear (git add .flox/ → teammate clones and runs `flox activate`; agent workflow: `flox search jq` → `flox install jq` → `flox activate -- jq ...`), hooks use idempotency guards as checkpoints, and Debugging maps symptoms to fixes. Falls short of 5 because workflows lack an explicit validation step (e.g., verifying an install with `flox list` after editing the manifest); no destructive/batch cap applies.

4 / 5

Progressive Disclosure

No bundle files exist and the ~490-line SKILL.md inlines language-specific recipes (Python/Node/Rust/Go/C++), services configuration, and debugging that would fit references/ files. Section headers are clear and Related Skills points to the plugin's other skills, but content that should be separate is inline, matching the middle anchor rather than the well-split 4-5 anchors.

3 / 5

Total

15

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20

Passed

Description

96%Weight 40%Scale 1-5

Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.

An exemplary description: concrete third-person capabilities, explicit use-when triggers with both scenario phrases and Flox-specific artifact names, and a clear niche. The only mild risk is its intentionally broad activation on generic toolchain-setup requests, which could compete with other environment-management skills.

DimensionReasoningScore

Specificity

'Create reproducible, cross-platform (macOS/Linux) development environments with Flox, a declarative Nix-based environment manager' plus concrete actions — 'installing system-level dependencies (compilers, databases, native libs), pinning exact package versions for a team, onboarding developers, running local services (PostgreSQL, Redis, Kafka)' — lists multiple specific concrete actions with comprehensive coverage in third-person voice, matching the top anchor rather than the 'minor gaps' 4 anchor.

5 / 5

Completeness

The first sentence explicitly states what the skill does ('Create reproducible, cross-platform (macOS/Linux) development environments with Flox...') and the 'Use when...' and 'Also use when...' clauses give explicit, concrete trigger scenarios — clearly and explicitly answers both what and when, exactly the top anchor.

5 / 5

Trigger Term Quality

Natural user phrases ('setting up project toolchains', 'onboarding developers', "solving 'works on my machine' problems") are combined with concrete artifact and command names ('.flox/', 'manifest.toml', 'flox activate', 'FloxHub') and specific service names — comprehensive natural-term coverage including file paths and command synonyms.

5 / 5

Distinctiveness Conflict Risk

Flox-specific triggers (.flox/, manifest.toml, flox activate, FloxHub) give it a clear, mostly distinct niche, but broad triggers like 'setting up project toolchains' and 'installing system-level dependencies' could overlap with general package-manager or container/devcontainer skills. It sits between 'minor overlap risk with closely related skills' (4) and 'minimal conflict risk' (5), leaning 4 because the deliberately broad when-activation clause widens the net beyond Flox-mentions.

4 / 5

Total

19

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20

Passed

Validation

93%

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation — 15 / 16 Passed

Validation for skill structure

CriteriaDescriptionResult

metadata_version

'metadata.version' is missing

Warning

Total

15

/

16

Passed

Repository
affaan-m/ECC
Reviewed

Table of Contents

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