{"slug":"deps-update","title":"deps-update","summary":"Bump outdated Hex deps — inventory, snapshot changelogs, update, fix breaks, split reviewable PRs (patches bundled, majors solo). Use to upgrade/bump Elixir dependencies or when versions fall behind. NOT for deps.get failures (/phx:investigate).","platform":"Claude","tags":[],"authorName":"LLM Mart","authorSlug":"llm-mart","score":0,"source":"github","price":null,"verified":false,"createdAt":"2026-10-04T15:14:11.695605Z","repo":{"url":"https://github.com/oliver-kriska/claude-elixir-phoenix","stars":560,"forks":44,"license":"MIT","updatedAt":"2026-10-02T04:11:38Z"},"bodyHtml":"
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name: deps-update\ndescription: Bump outdated Hex deps — inventory, snapshot changelogs, update, fix breaks, split reviewable PRs (patches bundled, majors solo). Use to upgrade/bump Elixir dependencies or when versions fall behind. NOT for deps.get failures (/phx:investigate).\neffort: high\nargument-hint: \"[--scope patch|minor|major|all] [--pkg

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Dependency Update (Freshness)

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Inventory → update → fix breaks → grouped PRs. This is the only MUTATING\ndeps skill: it edits mix.exs, mix.lock, and source. Security scanning\nstays in /phx:deps-audit; the vet ledger stays in /phx:deps-vet.

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Usage

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/phx:deps-update                       # inventory + interactive scope pick\n/phx:deps-update --scope patch         # bundle all patch bumps, one PR\n/phx:deps-update --pkg phoenix_live_view   # one package (+ coupled group)\n/phx:deps-update --dry-run             # inventory only, no changes\n
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Iron Laws

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    \n
  1. NEVER cross a major version without an explicit mix.exs edit —\nmix deps.update stays within requirements. Edit the constraint first;\nadd override: true only when mix hex.outdated <pkg> shows a\ntransitive consumer blocking. One major per PR
    2. \n
  2. ALWAYS snapshot the changelog delta BEFORE updating — capture\ndeps/<pkg>/CHANGELOG.md, then delta via mix hex.package diff. Never\nupdate blind
    3. \n
  3. NEVER claim an update is safe without verification — run\n/phx:verify (compile --warnings-as-errors + test). \"Compiles\" ≠ \"works\"
    4. \n
  4. ALWAYS move coupled packages together — Phoenix core, Ecto, Ash,\nOban, telemetry families update in the SAME step/commit (see\n${CLAUDE_SKILL_DIR}/references/coupled-groups.md)
    5. \n
  5. NEVER commit a partial bump — mix.lock + mix.exs edits + (for\nPhoenix-family) assets/package-lock.json in ONE commit
    6. \n
  6. HAND OFF security to /phx:deps-audit — run it on the lock diff\nbefore any PR; don't reimplement audit rules
    7. \n
  7. hex.outdated exit 1 is normal — it means \"deps are outdated\", not\nfailure. Capture with || true
    8. \n
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Workflow

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Phase 0: Discover

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Read mix.exs: deps list, umbrella (apps_path:), git/path deps, private\norgs (organization:/repo: in tuples), Phoenix/Ash presence. Create\nscratch dir .claude/deps-update/{YYYY-MM-DD}/.

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Phase 1: Inventory

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mix hex.outdated --all || true — parse the text table (no JSON exists;\nsee ${CLAUDE_SKILL_DIR}/references/update-mechanics.md). Classify each\nrow patch/minor/major by semver delta; Update not possible = blocked\nmajor (mix.exs constraint). Write inventory.md to scratch. Render\ngrouped table: Patch / Minor / Major / Blocked / Git-deps (manual).\n--dry-run stops here.

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Phase 2: Scope (AskUserQuestion)

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Present groups with counts and risk. Default recommendation: \"Patches (N)\n— low risk, bundle into one PR\". --scope/--pkg flags skip the prompt.\nWhen ≥2 members of a coupled group are outdated, force them into one step\neven under a narrower scope.

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Phase 3: Per-Package Update Loop

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For each selected package, in coupled-group order:

\n
    \n
  1. Snapshot deps/<pkg>/CHANGELOG.md → scratch/before/
    2. \n
  2. Update — patch/minor: mix deps.update <pkg> [coupled...];\nmajor: edit mix.exs constraint (+ override: true if needed), then\nmix deps.update <pkg>
    3. \n
  3. git diff mix.lock → the REAL {pkg, old, new} set (hex.outdated says\nwhat could change; the lock diff says what did)
    4. \n
  4. Changelog delta: mix hex.package diff <pkg> <old>..<new> — keep the\nCHANGELOG hunk. Empty → gh api repos/{o}/{r}/releases fallback →\ncompare-URL note (see ${CLAUDE_SKILL_DIR}/references/changelog-sources.md)
    5. \n
  5. Write scratch/{pkg}-{old}-{new}.md
    6. \n
  6. Phoenix-family in the diff + assets/package.json exists →\nnpm install --prefix assets, stage assets/package-lock.json with\nthe same commit
    7. \n
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Phase 4: Verify

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Run /phx:verify. On failure → Phase 5; else Phase 6.

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Phase 5: Breaking-Change Fixes

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Read the changelog deltas for \"breaking\"/\"removed\"/\"deprecated\" + the\ncompile/test errors. Fix source (apply the sibling-file check). Re-verify.

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Phase 6: Security Handoff

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Run /phx:deps-audit on the working mix.lock diff (its Mode B default).\nBLOCK findings → surface and offer /phx:deps-vet <pkg> <ver> for\naccepted risks. Never skip this before a PR.

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Phase 7: Group, Commit, PR

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Apply the splitting strategy (${CLAUDE_SKILL_DIR}/references/pr-strategy.md):\npatches bundled, minors by area, majors solo, coupled groups always\ntogether. PR bodies cite the changelog excerpt, the\nhttps://diff.hex.pm/diff/<pkg>/<old>..<new> link, verification result,\nand the deps-audit risk band. Stage lock + mix.exs + package-lock together.

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Integration

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/phx:deps-update (mutating) → /phx:deps-audit (security, Mode B)\n        │                              │ BLOCK → /phx:deps-vet (ledger)\n        └→ /phx:verify (gate) → grouped commits / PRs\n
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References

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