# Quickapps Code Review > Use before creating a PR or claiming a change is ready (or on explicit user invocation). Self-reviews the current diff against the patterns this team's reviewers consistently flag. - Skill: `epam/quickapps-code-review` (Agent Skill, multi-file: 2 files) - Install (CLI): `npx skillmds@latest add epam/quickapps-code-review` - Raw SKILL.md: https://api.skillmd.com/api/skills/epam/quickapps-code-review/raw - Safety review: pending - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: Coding & Dev Tools - Author: epam (https://skillmd.com/u/epam) - Updated: 2026-09-10 - Page: https://skillmd.com/skills/epam/quickapps-code-review --- # quickapps-code-review Self-review the current diff against the recurring feedback this team's reviewers actually leave. Catches it before they do. ## When to use - Before `gh pr create` - After finishing a feature or fix, before claiming "done" - When the user explicitly asks for a "review", "self-review", or "pre-submit check" ## Arguments `scope` = `$scope` (one of `pr` | `uncommitted`; if empty, default to `pr`): - `pr` — review **only committed** changes on the current branch vs `development`. Use exactly: `git diff development...HEAD` **Do not** run plain `git diff` (no revision range), `git diff --staged`, or include `git status` output. Uncommitted/unstaged files are out of scope. - `uncommitted` — review **only** working-tree + staged changes (not yet committed). Use exactly: `git diff HEAD` Do not include committed changes from the branch. If the resolved diff is empty (or whitespace-only), report **"nothing to review"** and stop — do not write a review file. ## How to run 1. Resolve the diff using **only** the command listed for `$scope` above. If `$scope` is empty, treat it as `pr`. Never mix scopes in one run. 2. For every **new or renamed** function, method, or class in the diff: verify call sites with `findReferences` / `Grep` (production + tests). Flag zero production callers unless the symbol is explicitly test-only. 3. Walk the checklist below **per file changed**. For each hit, report: file:line, the rule, and a concrete suggested fix. 4. Group findings as **Blocking** (would get a "change requested") vs **Nit** (would get a `nit:` tag). Render each finding as a markdown checkbox (`- [ ]`) so they can be ticked off as they are addressed. 5. End with a short verdict: ship / fix-then-ship / split. 6. **Save the review** to `docs/reviews/__.md`: - ``: current branch from `git rev-parse --abbrev-ref HEAD`, with `/` replaced by `-`. Keep prefixes (`feat-`, `fix-`, `chore-`) as-is. - ``: short local datetime from `date +%Y%m%d-%H%M`. - Create `docs/reviews/` if missing, then write the file (both pre-approved). - Surface the review in the chat too — don't rely on the file alone. When verifying field existence (§9) or whether an identifier still exists after a rename (§6, §8), prefer LSP (`hover`, `goToDefinition`, `findReferences`) over re-reading files. This skill is read-only; navigation tools are too. Do NOT auto-apply fixes unless the user asks — surface them first. ## The checklist The single most common review comment is some form of **"why is this here?"** — apply that lens to every new file, field, parameter, import, and comment. ### 1. Necessity — "why is this here?" **This is the single most frequently left comment — most often phrased "is it used?" / "where is it used?" / "clean up".** Trace every new symbol to a real consumer before submitting. - [ ] Any new field, parameter, import, file, or comment that isn't load-bearing? Delete it. - [ ] Method or function defined but never called (dead code)? Delete it — verify with LSP `findReferences`, not a guess. - [ ] Local variable assigned but unused, or used exactly once? Drop it or inline the expression. - [ ] Public method that only delegates to a private one with no added logic? Collapse them into one. - [ ] Unused subclass parameter required by parent interface? Mark intent explicitly (e.g. `del param`) — don't silently leave it. - [ ] Self-explanatory code annotated with a redundant comment? Drop the comment. - [ ] Redundant control flow (e.g. `else` after a branch that already returns/handles), or a check made redundant by an earlier filter/guard? Drop it. ### 2. PR scope - [ ] Diff contains unrelated renames, refactors, test scaffolding, or fixtures? Split into a separate PR. - [ ] Whitespace-only or "replace all" bleed in schemas / design docs? Revert those hunks. - [ ] **PR title/body still describes reverted or dropped work?** Compare the description bullet list to the actual diff (e.g. a move/preset called out in the PR text but absent from the branch). Update before submit. ### 3. Module boundaries / imports - [ ] Upward imports against the documented dependency direction (shared layers must not import from feature layers)? Fix the direction. *Example: `common/` importing from `agent/`.* - [ ] Reaching into a dependency's internals when its public API exposes the same symbol? Prefer the public surface — even when the internal is re-exported. *Includes importing from a third-party private package (e.g. `aidial_client._...`) when the symbol is re-exported by its public package.* - [ ] Sibling feature modules importing each other? Extract shared code into a shared layer. - [ ] Code (and its DI binding) consumed by exactly one module but parked in a shared/`common/` layer? Move it into the consuming module; only genuinely cross-cutting code belongs in shared. - [ ] Accessing a protected member (`_x`) of another module's class? That's a boundary leak — expose a public surface or relocate the code. - [ ] Imports *between modules inside the same internal package* (`_foo.py` ↔ `_bar.py`)? Use relative imports (`from ._bar import ...`) to avoid circular imports at package load. ### 4. DI / Injector - [ ] Service instantiated directly (`Foo()`) where another site injects it? Unify on constructor injection. - [ ] Value threaded through as a constructor/method parameter when it's already available via injection (e.g. request-scoped messages, config)? Inject it instead of passing it. - [ ] New DI binding added? It must be wired into **every** assembly point (prod entry + integration-test container). - [ ] Duplicate bindings of the same protocol/type? Pick one. - [ ] **Request-scoped type bound in a module but parameter typed `T | None = None`?** If every production call site injects it, make the parameter required — optional-only-for-tests confuses, as this project uses injector for dependencies. Use a test double via DI, not `None` defaults. ### 5. Settings - [ ] Any `os.getenv` in app code? **Reject.** Move to a `pydantic-settings` `BaseSettings`. To check if an env var was actually set, use `"field_name" in settings.model_fields_set`. - [ ] New `import os` solely for env access? Drop it. ### 6. Naming & consistency - [ ] Name leaks the implementation entity rather than describing the feature? Prefer feature-oriented names. *Also: name new constructs generically when a feature request to broaden them is foreseeable (e.g. `static_tools` over a vendor-specific name).* - [ ] Same string appears in code, JSON config, defaults, and error messages? Lift it to a single shared constant and reference it everywhere. - [ ] Subclass/identifier name doesn't match the actual exposed name (after a rename)? Realign all references. - [ ] Re-implementing a mechanism that already exists elsewhere (a decorator, helper, or base pattern used for sibling cases)? Reuse or generalize the existing one instead of writing a bespoke variant. *Example: a one-off `nullify` over building a shared `nullify_preview_fields`.* ### 7. Design doc fidelity - [ ] Touched a feature with a doc under `docs/designs/`? Update the doc body to match what was actually built. - [ ] Flip the doc's `Status:` line to `Implemented` in the same PR. - [ ] No broken doc cross-references introduced. - [ ] Implementation doesn't silently contradict a load-bearing assumption in the doc. ### 8. Schema / cache regeneration - [ ] Touched a config model? Run `make dump_app_schema` and commit the regenerated artifacts. - [ ] Renamed a tool that appears in cached LLM tool-call responses? Regenerate and commit those caches. ### 9. Typing & attribute access - [ ] `Any` used where a concrete type is available? Replace. - [ ] Value object as `@dataclass`? Use Pydantic `BaseModel` (frozen if immutable). - [ ] No-op `cast(...)` or `isinstance` check where the type is already known? Drop it. - [ ] `getattr(obj, "x")` where `obj.x` works? Use direct access. - [ ] Referencing a field on a typed object? Verify it actually exists on the type (LSP `hover`). ### 10. Decomposition - [ ] Method handles 2+ distinct phases? Extract each into a named method. - [ ] Class doing 2+ jobs or accumulating many constructor dependencies (e.g. invocation *and* config building)? Split the responsibilities into separate classes. - [ ] Same non-trivial logic appears in two places (even if it covers "different phases")? Either unify it or leave a comment justifying the intentional duplication. - [ ] Passing a collaborator into a free function that could be a method on that collaborator? Move it. - [ ] Nested branches that compute a boolean? Extract a one-liner. ### 11. Logging - [ ] f-strings or pre-formatted strings in `logger.debug/info(...)`? Switch to lazy `%`-form: `logger.debug("msg %s", arg)`. - [ ] Expensive serialization for debug-only output? Guard with `if logger.isEnabledFor(DEBUG):` or make lazy. - [ ] Serializing arbitrary config? Use `json.dumps(obj, ensure_ascii=False, default=str)`. ### 12. Security — forwarded headers - [ ] Forwarded-headers code that sets or defaults an `Authorization` header? It must never carry auth — strip it. A test asserting that scenario should be deleted, not added. ### 13. Subclass / protocol contracts - [ ] When subclassing a framework/tool base, implement every contract the design doc marks required — don't rely on defaults to fill them in. - [ ] Adding cross-cutting prompt/middleware injection for a single feature? Justify it; default expectation is "remove". ### 14. Multi-instance protocol state - [ ] Modeling multi-instance protocol state (interleaved stream deltas, parallel tool calls, concurrent sessions) as a single slot? Key it by id/index and preserve siblings when mutating one entry. ### 15. Pipelines that mix user and admin sources - [ ] Attachment/file/context pipelines must treat user-provided and admin-configured sources symmetrically — don't silently drop one. - [ ] Don't re-stream the same bytes to the model on every agent iteration; honor the lazy-loading contract. ### 16. Preview feature consistency - [ ] **Preview-gated config field?** Use `PreviewField(...)` from `base_config` — not ad-hoc `json_schema_extra` / `mark_json_schema_preview` on a field unless there is no field-level hook. - [ ] **Preview-gated model variant** (e.g. a new `$defs` entry in a discriminated union)? Prefer the same preview-marker machinery the codebase already uses (`PreviewField`, `has_preview_marker`, `_strip_preview_fields`) — e.g. a `@preview_model` / class decorator parallel to `PreviewField`, not a one-off `model_config = ConfigDict(json_schema_extra=mark_json_schema_preview)` unless that helper is the established pattern. Reviewers ask: "maybe decorator? as it is done for fields?" - [ ] **Runtime strip when preview is off?** Extend `nullify_preview_fields` (or shared preview validation) instead of bespoke `isinstance` + filter logic in `_gate_preview_fields`. Special-casing one preview type in `ApplicationConfig` will get "can you make it general, like `nullify_preview_fields`?" - [ ] Preview-off behaviour must log a warning when configured values are dropped — but through the shared preview path when possible, not duplicate warning strings. ### 17. Exception handling - [ ] Broad `except Exception` that wraps/re-raises errors which a narrower handler above already raised intentionally (e.g. a 422 swallowed and re-thrown as 500)? Let the intended error propagate; catch narrowly or re-raise the original. - [ ] Catching `Exception` where the operation has known failure modes? Catch the specific types instead (e.g. `UnicodeDecodeError` when decoding bytes, the SDK's `ResourceNotFoundError`/`EtagMismatchError` for file ops). ## Red flags — stop and reconsider If you find yourself thinking any of these while reviewing your own change, treat it as a blocker: | Thought | Reaction | |---|---| | "This bit isn't strictly needed but might be useful later" | Delete it — a reviewer will ask "why is this here?" | | "This method/var might get used eventually" | If nothing calls it now, delete it — "is it used?" is the #1 comment. | | "I'll wrap `except Exception` around it to be safe" | You may be swallowing a specific error a caller relies on. Catch narrowly. | | "I'll put this helper in `common/` for now" | If one module uses it, it lives in that module. | | "I'll just sneak this rename in" | No. Separate PR. | | "It's just one `os.getenv`" | Move to BaseSettings. | | "I'll update the design doc in a follow-up" | Do it in this PR. | | "common/ importing from agent/ is fine for now" | It is not. Fix the direction. | | "The cached tool-call responses still work" | If you renamed a tool, regenerate caches. | | "`Any` is fine here" | Use the concrete type. | | "Optional `None` default makes tests easier" | Injector always provides it in prod — require the type. | | "I'll add a helper now in case we need it later" | Grep for callers first — dead code gets "is it used anywhere?" | | "Special-case preview strip in the validator" | Extend `nullify_preview_fields` / shared preview machinery instead. | | "PR description is close enough" | Every bullet must match the diff after any revert/split. | ## Output format The file saved to `docs/reviews/` and the in-chat summary share this layout: ```markdown # Code review — ($scope) _Generated: _ ## Blocking - [ ] `path/to/file.py:42` — § : . Suggested: . - [ ] ... ## Nits - [ ] `path/to/file.py:88` — § : . Suggested: . ## Scope / structure - [ ] split-PR concerns, missing schema regen, design-doc updates, etc. ## Verdict ``` Every finding is a checkbox — the author ticks them off as fixes land. ## Maintenance This checklist drifts as conventions evolve. At the start of every review run, check freshness: ```bash git log -1 --since='7 days ago' --format=%h -- .claude/skills/quickapps-code-review/SKILL.md ``` - **Non-empty output** → fresh. Skip; don't load `references/REFRESHING.md`. - **Empty output** → stale. Tell the user "the review checklist hasn't been refreshed in over a week; refresh recommended" and offer to run it. Load [references/REFRESHING.md](references/REFRESHING.md) **only** if the user agrees. Refresh is always separate from the review run — never block reviewing on a stale checklist.