registry: add vfox backend for ag (The Silver Searcher)

[jdx]

Summary

• Add vfox backend for ag (The Silver Searcher) as the primary backend
• Keep asdf backend as fallback
• Add test command for version verification

The vfox plugin is at https://github.com/mise-plugins/vfox-ag and compiles ag from source with:

• Support for GitHub token to avoid API rate limiting
• -fcommon flag for GCC 10+ compatibility
• Proper env_keys.lua hook for PATH setup

Test plan

• CI tests pass on Ubuntu and macOS: https://github.com/mise-plugins/vfox-ag/actions/runs/19773975739
• Local testing with mise x "vfox:mise-plugins/[email protected]" -- ag --version

🤖 Generated with Claude Code

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Note

Adds vfox:mise-plugins/vfox-ag as the primary backend for tools.ag, keeping asdf:mise-plugins/mise-ag as fallback and noting a commented-out version test.

• Registry (registry.toml):
  • tools.ag:
    • Set primary backend to vfox:mise-plugins/vfox-ag with asdf:mise-plugins/mise-ag as fallback.
    • Add commented test line for version verification (requires libpcre).

^{Written by Cursor Bugbot for commit 28bfdd0. This will update automatically on new commits. Configure here.}

[Copilot]

Pull request overview

This PR adds vfox as the primary backend for the ag (The Silver Searcher) tool, with the existing asdf backend serving as a fallback. The vfox plugin compiles ag from source with improved compatibility and includes a test command for version verification.

• Added vfox backend as the primary option for ag installation
• Retained asdf backend as a fallback option
• Added test command to verify ag installation and version

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[github-actions]

Hyperfine Performance

mise x -- echo

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
mise-2025.11.10 x -- echo	19.8 ± 0.4	19.0	22.3	1.03 ± 0.03
mise x -- echo	19.3 ± 0.5	18.4	23.0	1.00

mise env

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
mise-2025.11.10 env	19.4 ± 0.7	18.6	27.9	1.03 ± 0.05
mise env	18.9 ± 0.5	18.0	20.5	1.00

mise hook-env

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
mise-2025.11.10 hook-env	19.4 ± 0.4	18.6	22.7	1.02 ± 0.04
mise hook-env	19.1 ± 0.6	18.1	24.3	1.00

mise ls

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
mise-2025.11.10 ls	16.6 ± 0.4	15.9	18.0	1.02 ± 0.04
mise ls	16.3 ± 0.5	15.5	18.4	1.00

xtasks/test/perf

Command	mise-2025.11.10	mise	Variance
install (cached)	108ms	108ms	+0%
ls (cached)	65ms	66ms	-1%
bin-paths (cached)	71ms	72ms	-1%
task-ls (cached)	420ms	425ms	-1%