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Plan Elixir/Phoenix Feature · oliver-kriska | DecimalAI

codingby oliver-kriska

Plan Elixir/Phoenix Feature

oliver-kriska/phx-plan

Source oliver-kriska/claude-elixir-phoenix ↗License MIT

Plan features spanning multiple domains: billing (Stripe), auth (RBAC), real-time (Presence), webhooks, jobs (Oban).

SkillScore57Maintained

Automatic

Coding pack

Last verified 9/2/2026

What it changes

Passed 9 of 16 test cases with the skill, and 6 of 16 without it.

Without skill35%

With skill57%

Checks it passed that the model alone missed

The output includes a Risks section with three self-check questions.
The output specifies creating `.claude/plans/user-billing/scratchpad.md`.
The output instructs the user to run `/new` to open a fresh session before starting work.

and 2 more in the full report

5 fixed8 passed either way10 still failing0 broke

Pass-rate lift: +22 pp
Tokens: +32%
Agent turns: 0%
Response time: -51%

Model gemini-3.6-flashMeasured 9/2/2026v513 of 23 cases passed with skill · 16 comparable

Tokens, turns and time describe resource use, not a dollar price.

Use this skill

Save it into your project's skills folder. Claude Code picks it up in its next session.

curl -fsSL --create-dirs -o .claude/skills/oliver-kriska-phx-plan/SKILL.md https://app.decimal.ai/s/oliver-kriska-phx-plan/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add oliver-kriska-phx-plan, and start Claude Code with claude --plugin-dir "$(git rev-parse --show-toplevel)/.agents"

1 · One-time — install the CLI (docs ↗)

pip install "decimalai>=0.15"

2 · Get the skill — writes .agents/skills/oliver-kriska-phx-plan/ and pins it in .decimal/skills.lock

decimalai skills add oliver-kriska-phx-plan

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/oliver-kriska-phx-plan/SKILL.md https://app.decimal.ai/s/oliver-kriska-phx-plan/SKILL.md

Raw file: /s/oliver-kriska-phx-plan/SKILL.md ↗ · machine-readable summary at /s/oliver-kriska-phx-plan.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 5 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 5

Prompt

Before starting research on a feature with slug `user-billing`, where must the initial concern-track checklist be created?

What was checked, without and with the skill
Checked	Without skill	With skill
The output specifies creating `.claude/plans/user-billing/scratchpad.md`.	Missed	Passed

case-18 · gemini-3.6-flash · 9/2/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md138 lines7 files

Plan Elixir/Phoenix Feature

Plan a feature by researching the relevant Elixir/Phoenix concerns, then output a structured plan with checkboxes.

What Makes /phx-plan Different from /plan

Covers relevant concerns through resumable research tracks
Plans with [ecto], [liveview], [oban] task routing
Checks for Iron Law compliance in the plan
Includes mix compile/format/credo/test verification
Understands Phoenix context boundaries

Usage

/phx-plan Add user avatars with S3 upload
/phx-plan .claude/plans/notifications/reviews/notifications-review.md
/phx-plan Implement notifications --depth deep
/phx-plan .claude/plans/auth/plan.md --existing

Arguments

Text after the skill name = feature description, review file, or existing plan
--depth quick|standard|deep = Planning depth (auto-detected)
--existing = Enhance an existing plan with deeper research

Workflow

Gather context — File path (skip to research), brainstorm interview.md (skip clarification), clear description, or vague
Clarify if vague — Ask questions ONE at a time (skip if brainstorm interview.md exists with Status: COMPLETE)
Detect depth — Auto-detect quick/standard/deep
Create research state — Before research, create .claude/plans/{slug}/scratchpad.md with a concern-track checklist
Gather optional runtime context — Only when Tidewave tools are independently configured and exposed; otherwise inspect source, routes, schemas, and tests
Research selectively — Cover only relevant concerns. Native generic

Track record

Benchmark

9 / 16

test cases passed, vs 6 / 16 without

Adoption

Users: 0
Times used: 0

Safety and source details

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v5 — 9/2/2026

View 15 scanner checks

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

oliver-kriska / claude-elixir-phoenix

targets/amp/skills/phx-plan/SKILL.md

View on GitHub ↗

License MITImported 9/2/2026Version v5Bundled 6 files

More skills from the same source and nearby in the registry, with their headline benchmark lift.

Ready to supercharge your AI agents?

See it in action

What's inside

Plan Elixir/Phoenix Feature

What Makes /phx-plan Different from /plan

Usage

Arguments

Workflow

Track record

Benchmark

Adoption

SkillSafety

Source

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