> ## Documentation Index > Fetch the complete documentation index at: https://site.aspect.build/llms.txt > Use this file to discover all available pages before exploring further. # Task context `function` **TaskContext.defer**

              
          def TaskContext.defer(
          callable: typing.Any,
          /,
          \*args: typing.Any,
          \*\*kwargs: typing.Any
          ) -> None
        
      
    

Register a callable to run after `_impl` returns, modeled on Go's `defer`: args bound at the defer site, LIFO order, fires even when `_impl` aborts. Per-defer errors are logged and do not change the task's exit code. `function` **TaskContext.http**

        
          def TaskContext.http() -> Http

HTTP client for issuing requests to remote services. `property` **TaskContext.args**

        
          TaskContext.args: Arguments

Resolved arguments for this task invocation. Read individual values as `ctx.args.`. Values are produced by merging, in order of decreasing precedence: explicit CLI flags, `config.axl` overrides, and the task's declared arg defaults. `property` **TaskContext.aspect**

        
          TaskContext.aspect: aspect.Aspect

Aspect platform integrations — authentication and other hosted services provided by the Aspect Workflows backend. `property` **TaskContext.bazel**

        
          TaskContext.bazel: bazel.Bazel

Drive Bazel from a task: run `build`, `test`, `query`, `info`, parse `.bazelrc`, and consume Build Event Stream output. `property` **TaskContext.std**

        
          TaskContext.std: std.Std

The standard library. Gives access to common utilities such as filesystem, process execution, environment variables, and IO streams. `property` **TaskContext.task**

        
          TaskContext.task: TaskInfo

Identity of the currently running task — its name, group(s), short human-readable key, and globally unique id. `property` **TaskContext.template**

        
          TaskContext.template: Template

Render template files by substituting placeholders with values. `property` **TaskContext.traits**

        
          TaskContext.traits: TraitMap

Configured trait instances visible to this task. Index by a trait type to read its fields, e.g. `ctx.traits[GitHub].token`. Only trait types this task opted into via `task(traits = [...])` are present. `property` **TaskContext.wasm**

        
          TaskContext.wasm: wasm.Wasm

Execute WebAssembly modules within a task. EXPERIMENTAL: this surface may change or be removed without notice.