Feature Request: Add post-install command option

[Automaat]

Problem

Many projects use mise run install or similar tasks to install project dependencies after tool installation. Currently requires separate workflow step:

- uses: jdx/mise-action@v3
- run: mise run install  # Extra step needed

Proposed Solution

Add post_install_command parameter:

- uses: jdx/mise-action@v3
  with:
    post_install_command: "mise run install"

Would execute after mise install completes, before action finishes.

Use Cases

• mise run install - Install npm/pip/cargo deps
• mise run setup - Project-specific setup

Benefits

• Cleaner workflows (one step vs two)
• Ensures commands run in correct mise environment
• Common pattern in many projects

Backwards Compatibility

Fully backwards compatible - optional parameter with empty default.

[christopher-buss]

If you have a mise.toml file, you can use hooks:

[hooks]
postinstall = "npx corepack enable"

[andrewthauer]

If you have a mise.toml file, you can use hooks:

[hooks]
postinstall = "npx corepack enable"

I experimented with this and had inconsistent results. On a stale cache hit it didn't seem to run the hook (only on a cache hit).

I was also hoping this would allow for caching any dependencies installed during the hook but this also does not seem to be the case atm.