Summary of Changes

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This pull request introduces a new --skip-tools flag to the mise run command. This enhancement allows users to skip the tool installation step before running tasks, which is beneficial in environments where tools are already pre-installed, such as CI. The PR includes an E2E test to ensure the flag functions as expected, both as a mise flag and as a task argument.

Highlights

• New Feature: Introduced the --skip-tools flag to the mise run command, allowing users to bypass tool installation before running tasks.
• CI Optimization: This flag is particularly useful in CI environments where tools are pre-installed, reducing overhead by skipping unnecessary installation steps.
• Task Argument Handling: The flag's behavior depends on its placement: before the task name, it acts as a mise flag; after the task name, it's passed as an argument to the task.
• Testing: An E2E test (test_task_skip_tools) was added to verify the correct behavior of the --skip-tools flag in different scenarios.

Greptile Summary

This PR adds a --skip-tools boolean flag to mise run / mise tasks run that bypasses automatic tool installation — both the initial project-level install_missing_versions call and the per-task install_task_tools call — making it a clean opt-in for CI environments where tools are already provisioned. Default behaviour is completely unchanged.

• Implementation (src/cli/run.rs): two if !self.skip_tools { … } guards wrap the two existing install callsites; the flag field follows the same structural pattern as skip_deps.
• Default initialisation (src/cli/mod.rs): skip_tools: false added to the explicit Run struct init used for bare task dispatch.
• Tests (e2e/tasks/test_task_skip_tools): three assertions cover flag-as-mise-flag (before task name), flag-as-task-arg (after task name), and an actual skip-verification using a check-tiny task that declares tools = { tiny = "1.0.0" } — ensuring the install path is genuinely bypassed, not merely tested for correct parsing.
• Docs / spec / completions: docs/cli/run.md, docs/cli/tasks/run.md, man/man1/mise.1, mise.usage.kdl, and xtasks/fig/src/mise.ts are all updated consistently.

Confidence Score: 4/5

• Safe to merge — default behaviour is unchanged, the flag is purely opt-in, and both install paths are correctly guarded.
• The core logic is correct and tests are solid. Two items surfaced in prior review threads remain open (the missing env = "MISE_TASK_SKIP_TOOLS" attribute for parity with skip_deps, and the doc comment claiming task.run_auto_install = false is equivalent when no bridging code wires that setting into self.skip_tools). Neither blocks the primary user path, but the doc/code gap in particular could mislead users who configure the setting and expect the same skipping behaviour as the flag. Scoring 4 rather than 5 to signal those are worth a targeted follow-up before close.
• src/cli/run.rs — the skip_tools field declaration (env attr gap and setting-bridging gap noted in prior threads)

Important Files Changed

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A["mise run flags task args"] --> B{"--skip-tools\nbefore task name?"}
    B -- Yes --> C["skip_tools = true\nmise flag consumed"]
    B -- No --> D["skip_tools = false\narg passed to task"]

    C --> E["Build Toolset\nToolsetBuilder"]
    D --> E

    E --> F{skip_tools?}
    F -- false --> G["install_missing_versions\nproject-level tools"]
    F -- true --> H["skip project-level install"]

    G --> I["resolve tasks\nget_task_lists"]
    H --> I

    I --> J["prepare_tasks\nfetch remotes, build Deps graph"]
    J --> K{skip_tools?}
    K -- false --> L["install_task_tools\nper-task tool declarations"]
    K -- true --> M["skip per-task install"]

    L --> N["setup_executor\nrun tasks"]
    M --> N

_{Reviews (5): Last reviewed commit: "chore: regenerate manpage for --skip-too..." | Re-trigger Greptile}

Hyperfine Performance

mise x -- echo

mise env

mise hook-env

mise ls

xtasks/test/perf