Documents the Fakt code generation pipeline — immutable AST model, builder DSL, renderer, default value strategies, and extension functions. Use when modifying code generation, changing generated output, adding new generated patterns, understanding builders or renderers, adding a new default value strategy, or debugging generated output. Make sure to use this skill whenever generated Kotlin code needs to change — the pipeline has strict conventions (immutable AST, builder DSL, renderer separation) that must be followed even for small changes.

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Creates project commits — Conventional Commits format, message quality (72 char subject, 80 char body), staged-change checks, and the AI co-author trailer. Use when committing changes, running /commit, creating commit messages, or reviewing commit message quality. Make sure to use this skill whenever a git commit is being created — it is the project's commit workflow and replaces the default one.

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Validates compilation of generated Fakt fakes and diagnoses build failures — where fakes are generated, which path produced them, error classification, and root cause analysis. Use when compilation fails, generated code has errors, no fakes were generated, validating changes compile before committing, or checking if generated code is valid. Make sure to use this skill whenever a build error mentions generated fakes or the Fakt plugin — even if the root cause might be elsewhere, this skill's error classification pinpoints the actual source.

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Guides step-by-step through all 11 touchpoints for adding a new @Fake annotation option (like mutability or callHistory). Covers annotation enum, CLI processor, Gradle plugin, FIR metadata, FIR translator, the shared FakeDeclaration model, and code generators. Use when adding a new option to @Fake, adding a new enum to the annotation, making something configurable per-interface, implementing a new compiler plugin feature flag, adding a new Gradle extension property, or extending the three-tier resolution (annotation → plugin → default). Make sure to use this skill whenever a change touches more than one layer of the option pipeline, even for small additions like a new enum value.

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Creates well-structured GitHub issues using gh CLI with auto-detected project context (version, platform, module). Supports bug reports, feature requests, and internal tasks following repo templates. Use when creating a GitHub issue, reporting a bug, requesting a feature, logging a task, documenting a TODO as an issue, or recording a bug found during development. Make sure to use this skill whenever an issue needs to be created — it auto-detects project context and applies the correct template.

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Checks Kotlin compiler API usage against the Kotlin versions Fakt supports — which path runs on which compiler, how compat shims are written, how to verify across versions, and how to bump Kotlin. Use when calling a new FIR/IR/compiler-plugin API, seeing NoSuchMethodError, NoSuchFieldError or NoClassDefFoundError from compiler classes, bumping the Kotlin version, or checking whether an API exists in the minimum supported Kotlin. Make sure to use this skill whenever compiler plugin code starts using a Kotlin compiler API it didn't use before — these APIs change between Kotlin releases and a break only shows up on an older supported version.

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