dagger-codegen

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Edit dagger.gen.go output, Go templates (object.go.tmpl, defs.go.tmpl), invoke() dispatch, SDK interfaces (CodeGenerator, ClientGenerator), `dagger develop`, `dagger client install`. Keywords: codegen, SDK, bindings, templates, internal/dagger, dag.*, ModuleMainSrc

G-Research-Forks By G-Research-Forks schedule Updated 1/28/2026
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name: dagger-codegen description: | Edit dagger.gen.go output, Go templates (object.go.tmpl, defs.go.tmpl), invoke() dispatch, SDK interfaces (CodeGenerator, ClientGenerator), dagger develop, dagger client install. Keywords: codegen, SDK, bindings, templates, internal/dagger, dag.*, ModuleMainSrc

Dagger Codegen

When to Load This Skill

  • Editing dagger.gen.go or internal/dagger/dagger.gen.go output
  • Modifying Go templates in cmd/codegen/generator/go/templates/
  • Changing SDK interfaces in core/sdk.go
  • Working on dagger develop, dagger call, or dagger client install
  • Debugging why generated code looks wrong

Critical Concepts

"Codegen" means 4 different things in Dagger:

# Name Trigger Key Files
1 In-Module Bindings dagger develop cmd/codegen/generator/go/templates/
2 Runtime Dispatch Module startup cmd/codegen/generator/go/templates/modules.go:140
3 SDK Libraries go generate sdk/go/generate.go
4 Generated Clients dagger client install _dagger.gen.go/client.go.tmpl

Know which one you're dealing with before editing.

Key Entry Points

To change... Edit
Generated method signatures cmd/codegen/generator/go/templates/src/_types/object.go.tmpl
Generated type definitions cmd/codegen/generator/go/templates/src/_types/*.go.tmpl
Module invoke() dispatch cmd/codegen/generator/go/templates/modules.go:140
Standalone client Connect() cmd/codegen/generator/go/templates/src/_dagger.gen.go/client.go.tmpl
Template functions cmd/codegen/generator/go/templates/functions.go:54
SDK interfaces core/sdk.go:20 (ClientGenerator), :93 (CodeGenerator)
Built-in SDK list core/sdk/consts.go
Python output sdk/python/codegen/src/codegen/generator.py

Reference Files

Load based on specific need:

Need Load
Understanding the 4 codegen types codegen-types.md
SDK architecture, interfaces, Go special case sdk-architecture.md
Go template conditionals, two-pass generation go-templates.md
dagger client install internals generated-clients.md
Install via CLI
npx skills add https://github.com/G-Research-Forks/dagger --skill dagger-codegen
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