Update MAGI protocol to support faster builds [chromium/src : main]

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Joe Downing (Gerrit)

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May 20, 2026, 4:28:19 PM (yesterday) May 20
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Joe Downing . resolved

PTAL!

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Yuwei Huang (Gerrit)

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May 20, 2026, 4:49:27 PM (yesterday) May 20
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Yuwei Huang . resolved

FWIW I wrote this in the root `GEMINI.md` file:

```
When building targets, use `out/debug` as the output directory.
```

Any I've never run into issues with the agent choosing the wrong directory.

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    Joe Downing (Gerrit)

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    May 20, 2026, 4:50:14 PM (yesterday) May 20
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    Joe Downing . resolved

    Thanks!

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    Chromium LUCI CQ (Gerrit)

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    May 20, 2026, 6:31:17 PM (24 hours ago) May 20
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    Change information

    Commit message:
    Update MAGI protocol to support faster builds

    When running MAGI, it often chooses an out directory like
    out/Default. It does not check whether that dir is configured
    to build locally or in a distributed fashion. This CL fixes
    that problem and adds some logic so the scoping agent looks
    for the output dir to use and prompts the user if it isn't
    sure.
    Change-Id: Ifca78780a5ee39b17271e1f7a3b55c0fc69c27a6
    Reviewed-by: Yuwei Huang <yuw...@chromium.org>
    Commit-Queue: Joe Downing <joe...@chromium.org>
    Cr-Commit-Position: refs/heads/main@{#1633874}
    Files:
    • M remoting/tools/magi-mode/EXAMPLES.md
    • M remoting/tools/magi-mode/SKILL.md
    • M remoting/tools/magi-mode/magi_schema.json
    • M remoting/tools/magi-mode/personas/core/scoping.json
    • M remoting/tools/magi-mode/personas/infra/chromium_build.json
    • M remoting/tools/magi-mode/tests/magi_stage_refine_tests.json
    • M remoting/tools/magi-mode/tests/testdata/project.magi.json
    Change size: M
    Delta: 7 files changed, 38 insertions(+), 12 deletions(-)
    Branch: refs/heads/main
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    Gerrit-Change-Number: 7862768
    Gerrit-PatchSet: 5
    Gerrit-Owner: Joe Downing <joe...@chromium.org>
    Gerrit-Reviewer: Chromium LUCI CQ <chromiu...@luci-project-accounts.iam.gserviceaccount.com>
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