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fix(megarepo): exclude skipped members from lock sync#743

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schickling/2026-06-04-megarepo-skip-lock-sync
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fix(megarepo): exclude skipped members from lock sync#743
schickling-assistant wants to merge 1 commit into
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schickling/2026-06-04-megarepo-skip-lock-sync

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Problem

mr apply --skip ... kept parts of skipped members in the lock-sync and generated-workspace proof graph. That meant a skipped member could still be used as a nested lock-sync target, shared lock authority source, or generator input even though the active apply scope excluded it.

Goal

A skipped megarepo member is outside the active proof graph for the invocation: it is not materialized as a target, not used as a nested lock-sync root, not used as a shared input authority, and not fed into generated workspace inputs.

Decisions

  • Thread CLI skipped member names into lock-sync exclusions instead of treating skips as only a worktree status filter.
  • Filter generated workspace inputs to the active member set so generators do not observe skipped members.
  • Ignore sharedInputSource when that source is excluded, because an excluded member cannot remain an authority for the active graph.

Verification

  • devenv tasks run test:megarepo
  • devenv tasks run ts:check

Both commands passed locally on this branch.

Complexity

No new abstraction. This tightens existing skip propagation across the existing megarepo engine and lock-sync boundaries.

Concerns

This changes --skip from a partial worktree convenience into a stricter active-graph boundary for lock-sync. That is the intended long-term contract, but callers that relied on excluded members as hidden authorities will need to make those dependencies explicit.

Friction & bottlenecks

The main friction was that skip semantics were split across status filtering, lock-sync planning, and generator input construction, so the invariant was easy to violate without an integration test. No measured resource bottleneck.

Follow-ups

After this lands, downstream repos should move branch pins back to the default effect-utils branch.

References

Refs downstream Hypermerge/Evergreen active-proof graph work.

Posted on behalf of @schickling
field value
agent_name 🧥 co2-mink
agent_session_id f56ab229-395a-466d-81a3-7c7453c23ac5
agent_tool Codex CLI
agent_tool_version 0.136.0
agent_runtime Codex CLI 0.136.0
agent_model unknown
worktree dotfiles/schickling/2026-05-30-hypermerge-post-cutover
machine dev3
tooling_profile dotfiles@unknown-dirty

github-actions Bot added a commit that referenced this pull request Jun 4, 2026
github-actions Bot added a commit that referenced this pull request Jun 4, 2026
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github-actions Bot commented Jun 4, 2026

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CI Measurements

partial - advisory gate - readiness partial (17/26 enabled observations gateable) - commit 13355c3 - protocol devenv-perf-warm-median-v2

No regressions. 1 probe got faster; 23 neutral or ungated rows are collapsed below.

Measurement change vs baseline chart

SVG source

devenv / quality gates

What changed? Group Probe Baseline -> current Raw change Impact Confidence
faster devenv / quality gates Warm cached check:quick 2.934 s -> 2.635 s -0.299 s / -10.2% -0.05x paired n=5, 25-75% delta -2.913 s..-0.014 s

nix / closures / packages

What changed? Group Probe Baseline -> current Raw change Impact Confidence
unchanged nix / closures / packages Nix sources closure size 0 B -> 0 B +0 B / n/a n/a unknown, baseline n=22, current n=1
unchanged nix / closures / packages Nix sources closure size 0 B -> 0 B +0 B / n/a n/a unknown, baseline n=22, current n=1
unchanged nix / closures / packages Nix sources closure size 0 B -> 0 B +0 B / n/a n/a unknown, baseline n=22, current n=1
unchanged nix / closures / packages Node / pnpm closure size 0 B -> 0 B +0 B / n/a n/a unknown, baseline n=22, current n=1
unchanged nix / closures / packages Node / pnpm closure size 0 B -> 0 B +0 B / n/a n/a unknown, baseline n=22, current n=1
unchanged nix / closures / packages Node / pnpm closure size 0 B -> 0 B +0 B / n/a n/a unknown, baseline n=22, current n=1
unchanged nix / closures / packages Rust closure size 0 B -> 0 B +0 B / n/a n/a unknown, baseline n=22, current n=1
unchanged nix / closures / packages Rust closure size 0 B -> 0 B +0 B / n/a n/a unknown, baseline n=22, current n=1
unchanged nix / closures / packages Rust closure size 0 B -> 0 B +0 B / n/a n/a unknown, baseline n=22, current n=1
Unchanged / 0-impact measurements (16)

These rows had compatible baseline data, but their semantic impact rounded to 0.00x because the movement was below the configured budget, below the noise floor, or inside the robust noise band.

devenv / devenv cli

Group Probe Baseline -> current Raw change Impact Gate Evidence Why hidden
devenv / devenv cli devenv processes --help 0.017 s -> 0.016 s -0.001 s / -5.9% 0.00x yes paired n=9, 25-75% delta -0.002 s..0 s Too small to matter
devenv / devenv cli devenv tasks list 0.035 s -> 0.036 s +0.001 s / 2.9% 0.00x yes paired n=9, 25-75% delta -0.001 s..0.001 s Too small to matter

devenv / devenv shell

Group Probe Baseline -> current Raw change Impact Gate Evidence Why hidden
devenv / devenv shell Warm shell eval 1.75 s -> 1.674 s -0.076 s / -4.3% 0.00x yes paired n=5, 25-75% delta -0.045 s..-0.035 s Too small to matter

devenv / genie

Group Probe Baseline -> current Raw change Impact Gate Evidence Why hidden
devenv / genie Genie run task 1.019 s -> 0.966 s -0.053 s / -5.2% 0.00x yes paired n=5, 25-75% delta -0.095 s..-0.031 s Too small to matter
devenv / genie Genie check direct 4.599 s -> 4.627 s +0.028 s / 0.6% 0.00x yes paired n=5, 25-75% delta -0.021 s..0.015 s Too small to matter

devenv / quality gates

Group Probe Baseline -> current Raw change Impact Gate Evidence Why hidden
devenv / quality gates Forced check:quick 8.263 s -> 8.249 s -0.014 s / -0.2% 0.00x yes paired n=3, 25-75% delta -0.229 s..-0.014 s Too small to matter

devenv / workspace setup

Group Probe Baseline -> current Raw change Impact Gate Evidence Why hidden
devenv / workspace setup pnpm install task 0.551 s -> 0.547 s -0.004 s / -0.7% 0.00x yes paired n=5, 25-75% delta -0.007 s..0.004 s Too small to matter

nix / closures / packages

Group Probe Baseline -> current Raw change Impact Gate Evidence Why hidden
nix / closures / packages Total closure size 508.3 MiB -> 535.4 MiB +27 MiB / 5.3% 0.00x yes within_budget, baseline n=22, current n=1 Slightly higher, ok
nix / closures / packages Total serialized NAR size 508.3 MiB -> 535.4 MiB +27 MiB / 5.3% 0.00x yes within_budget, baseline n=21, current n=1 Slightly higher, ok
nix / closures / packages Total closure size 142 MiB -> 144.4 MiB +2.4 MiB / 1.7% 0.00x yes noise_floor, baseline n=22, current n=1 Too small to matter
nix / closures / packages Total serialized NAR size 142 MiB -> 144.4 MiB +2.4 MiB / 1.7% 0.00x yes within_budget, baseline n=21, current n=1 Slightly higher, ok
nix / closures / packages Total closure size 153.9 MiB -> 156.3 MiB +2.4 MiB / 1.6% 0.00x yes noise_floor, baseline n=22, current n=1 Too small to matter
nix / closures / packages Total serialized NAR size 153.9 MiB -> 156.3 MiB +2.4 MiB / 1.6% 0.00x yes within_budget, baseline n=21, current n=1 Slightly higher, ok
nix / closures / packages Total closure path count 80 count -> 79 count -1 count / -1.2% 0.00x yes noise_floor, baseline n=22, current n=1 Too small to matter
nix / closures / packages Total closure path count 5 count -> 5 count +0 count / 0% 0.00x yes noise_floor, baseline n=22, current n=1 Too small to matter
nix / closures / packages Total closure path count 8 count -> 8 count +0 count / 0% 0.00x yes noise_floor, baseline n=22, current n=1 Too small to matter
Diagnostic / ungated measurements (7)

source / effect-utils

Group Probe Current Baseline Impact Gate Reason Evidence
source / effect-utils Genie CI workflow helpers lines 7318 lines 6773 lines diagnostic disabled Diagnostic only diagnostic, baseline n=23, current n=9
source / effect-utils Genie runtime lines 19423 lines 19016 lines diagnostic disabled Diagnostic only diagnostic, baseline n=23, current n=64
source / effect-utils Nix workspace tools lines 3631 lines 3359 lines diagnostic disabled Diagnostic only diagnostic, baseline n=23, current n=14
source / effect-utils Genie CI workflow helpers files 9 count 7 count diagnostic disabled Diagnostic only diagnostic, baseline n=23, current n=9
source / effect-utils Genie runtime files 64 count 62 count diagnostic disabled Diagnostic only diagnostic, baseline n=23, current n=64
source / effect-utils Nix workspace tools files 14 count 13 count diagnostic disabled Diagnostic only diagnostic, baseline n=23, current n=14

devenv / devenv shell

Group Probe Current Baseline Impact Gate Reason Evidence
devenv / devenv shell Shell eval with OTEL trace 22.65 s n/a n/a missing_baseline No baseline yet missing_baseline, baseline n=0, current n=1
All measurements
Status Gate Target Observation Dimensions Baseline Current Delta Ratio Impact
pass yes Dev shell Warm cached check:quick aggregation=median
devenvRev=2cf62a010000b70f15c78a72761fad7c9e6fb47a
measuredSampleCount=5
measurementProtocol=devenv-perf-warm-median-v2
otelServiceName=devenv-perf-ci
pairedOrderProtocol=balanced-seeded-alternating-v1
pairedOrderSeed=26959333385-1-7a13a86e518efd3d8f237e646473289881edb6c4
pairedSampleCount=5
phase=warm
probe=task_check_quick_warm
probeLabel=Warm cached check:quick
sampleCount=11
status=0
taskCacheMode=warm
warmupCount=1
workload=cached-no-op
2.934 s 2.635 s -0.299 s -10.2% -0.05x
pass yes Genie package Total closure size bucket=total 508.3 MiB 535.4 MiB +27 MiB 5.3% 0.00x
pass yes Genie package Total serialized NAR size bucket=total
sizeKind=nar
508.3 MiB 535.4 MiB +27 MiB 5.3% 0.00x
pass yes Megarepo package Total closure size bucket=total 142 MiB 144.4 MiB +2.4 MiB 1.7% 0.00x
pass yes Megarepo package Total serialized NAR size bucket=total
sizeKind=nar
142 MiB 144.4 MiB +2.4 MiB 1.7% 0.00x
pass yes oxlint npm package Total closure size bucket=total 153.9 MiB 156.3 MiB +2.4 MiB 1.6% 0.00x
pass yes oxlint npm package Total serialized NAR size bucket=total
sizeKind=nar
153.9 MiB 156.3 MiB +2.4 MiB 1.6% 0.00x
pass disabled effect-utils repository Genie CI workflow helpers lines scope=genie_ci_workflow 6773 lines 7318 lines +545 lines 8% diagnostic
pass disabled effect-utils repository Genie runtime lines scope=genie_runtime 19016 lines 19423 lines +407 lines 2.1% diagnostic
pass disabled effect-utils repository Nix workspace tools lines scope=nix_workspace_tools 3359 lines 3631 lines +272 lines 8.1% diagnostic
pass disabled effect-utils repository Genie CI workflow helpers files scope=genie_ci_workflow 7 count 9 count +2 count 28.6% diagnostic
pass disabled effect-utils repository Genie runtime files scope=genie_runtime 62 count 64 count +2 count 3.2% diagnostic
pass disabled effect-utils repository Nix workspace tools files scope=nix_workspace_tools 13 count 14 count +1 count 7.7% diagnostic
pass yes Genie package Total closure path count bucket=total 80 count 79 count -1 count -1.2% 0.00x
pass yes Dev shell Warm shell eval aggregation=median
devenvRev=2cf62a010000b70f15c78a72761fad7c9e6fb47a
measuredSampleCount=5
measurementProtocol=devenv-perf-warm-median-v2
otelServiceName=devenv-perf-ci
pairedOrderProtocol=balanced-seeded-alternating-v1
pairedOrderSeed=26959333385-1-7a13a86e518efd3d8f237e646473289881edb6c4
pairedSampleCount=5
phase=warm
probe=shell_eval_warm
probeLabel=Warm shell eval
sampleCount=11
status=0
warmupCount=1
1.75 s 1.674 s -0.076 s -4.3% 0.00x
pass yes Dev shell Genie run task aggregation=median
devenvRev=2cf62a010000b70f15c78a72761fad7c9e6fb47a
measuredSampleCount=5
measurementProtocol=devenv-perf-warm-median-v2
otelServiceName=devenv-perf-ci
pairedOrderProtocol=balanced-seeded-alternating-v1
pairedOrderSeed=26959333385-1-7a13a86e518efd3d8f237e646473289881edb6c4
pairedSampleCount=5
phase=warm
probe=task_genie_run
probeLabel=Genie run task
sampleCount=11
status=0
warmupCount=1
1.019 s 0.966 s -0.053 s -5.2% 0.00x
pass yes Dev shell Genie check direct aggregation=median
devenvRev=2cf62a010000b70f15c78a72761fad7c9e6fb47a
measuredSampleCount=5
measurementProtocol=devenv-perf-warm-median-v2
otelServiceName=devenv-perf-ci
pairedOrderProtocol=balanced-seeded-alternating-v1
pairedOrderSeed=26959333385-1-7a13a86e518efd3d8f237e646473289881edb6c4
pairedSampleCount=5
phase=warm
probe=genie_check_direct
probeLabel=Genie check direct
sampleCount=11
status=0
warmupCount=1
4.599 s 4.627 s +0.028 s 0.6% 0.00x
pass yes Dev shell Forced check:quick aggregation=median
devenvRev=2cf62a010000b70f15c78a72761fad7c9e6fb47a
measuredSampleCount=3
measurementProtocol=devenv-perf-warm-median-v2
otelServiceName=devenv-perf-ci
pairedOrderProtocol=balanced-seeded-alternating-v1
pairedOrderSeed=26959333385-1-7a13a86e518efd3d8f237e646473289881edb6c4
pairedSampleCount=3
phase=warm
probe=task_check_quick_forced
probeLabel=Forced check:quick
sampleCount=6
status=0
taskCacheMode=refresh
warmupCount=0
workload=forced-task-cache
8.263 s 8.249 s -0.014 s -0.2% 0.00x
pass yes Dev shell pnpm install task aggregation=median
devenvRev=2cf62a010000b70f15c78a72761fad7c9e6fb47a
measuredSampleCount=5
measurementProtocol=devenv-perf-warm-median-v2
otelServiceName=devenv-perf-ci
pairedOrderProtocol=balanced-seeded-alternating-v1
pairedOrderSeed=26959333385-1-7a13a86e518efd3d8f237e646473289881edb6c4
pairedSampleCount=5
phase=warm
probe=task_pnpm_install
probeLabel=pnpm install task
sampleCount=11
status=0
warmupCount=1
0.551 s 0.547 s -0.004 s -0.7% 0.00x
pass yes Dev shell devenv processes --help aggregation=median
devenvRev=2cf62a010000b70f15c78a72761fad7c9e6fb47a
measuredSampleCount=9
measurementProtocol=devenv-perf-warm-median-v2
otelServiceName=devenv-perf-ci
pairedOrderProtocol=balanced-seeded-alternating-v1
pairedOrderSeed=26959333385-1-7a13a86e518efd3d8f237e646473289881edb6c4
pairedSampleCount=9
phase=warm
probe=processes_help
probeLabel=devenv processes --help
sampleCount=19
status=0
warmupCount=1
0.017 s 0.016 s -0.001 s -5.9% 0.00x
pass yes Dev shell devenv tasks list aggregation=median
devenvRev=2cf62a010000b70f15c78a72761fad7c9e6fb47a
measuredSampleCount=9
measurementProtocol=devenv-perf-warm-median-v2
otelServiceName=devenv-perf-ci
pairedOrderProtocol=balanced-seeded-alternating-v1
pairedOrderSeed=26959333385-1-7a13a86e518efd3d8f237e646473289881edb6c4
pairedSampleCount=9
phase=warm
probe=tasks_list
probeLabel=devenv tasks list
sampleCount=19
status=0
warmupCount=1
0.035 s 0.036 s +0.001 s 2.9% 0.00x
unknown missing_baseline Genie package Nix sources closure size bucket=nix-sources 0 B 0 B +0 B n/a n/a
unknown missing_baseline Megarepo package Nix sources closure size bucket=nix-sources 0 B 0 B +0 B n/a n/a
unknown missing_baseline oxlint npm package Nix sources closure size bucket=nix-sources 0 B 0 B +0 B n/a n/a
unknown missing_baseline Genie package Node / pnpm closure size bucket=node 0 B 0 B +0 B n/a n/a
unknown missing_baseline Megarepo package Node / pnpm closure size bucket=node 0 B 0 B +0 B n/a n/a
unknown missing_baseline oxlint npm package Node / pnpm closure size bucket=node 0 B 0 B +0 B n/a n/a
unknown missing_baseline Genie package Rust closure size bucket=rust 0 B 0 B +0 B n/a n/a
unknown missing_baseline Megarepo package Rust closure size bucket=rust 0 B 0 B +0 B n/a n/a
unknown missing_baseline oxlint npm package Rust closure size bucket=rust 0 B 0 B +0 B n/a n/a
pass yes Megarepo package Total closure path count bucket=total 5 count 5 count +0 count 0% 0.00x
pass yes oxlint npm package Total closure path count bucket=total 8 count 8 count +0 count 0% 0.00x
missing_baseline missing_baseline Dev shell Shell eval with OTEL trace aggregation=median
devenvRev=2cf62a010000b70f15c78a72761fad7c9e6fb47a
measuredSampleCount=1
measurementProtocol=devenv-perf-warm-median-v2
otelServiceName=devenv-perf-ci
pairedOrderProtocol=balanced-seeded-alternating-v1
pairedOrderSeed=26959333385-1-7a13a86e518efd3d8f237e646473289881edb6c4
pairedSampleCount=1
phase=warm
probe=shell_eval_traced
probeLabel=Shell eval with OTEL trace
sampleCount=2
status=0
warmupCount=0
n/a 22.65 s n/a n/a n/a
Source-of-truth JSON
{
  "schemaVersion": 1,
  "title": "CI Measurements",
  "status": "partial",
  "gate": "advisory",
  "readiness": "partial (17/26 enabled observations gateable)",
  "commit": {
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    "sha": "13355c3a8dc2c3cba0244ddbaee346c2977109ff"
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  "run": {
    "id": "26959333385",
    "attempt": "1",
    "url": "https://github.com/overengineeringstudio/effect-utils/actions/runs/26959333385"
  },
  "baseline": null,
  "protocol": "devenv-perf-warm-median-v2",
  "chart": {
    "meaning": "semantic-impact",
    "zeroImpactMeaning": "no actionable PR impact after budgets, noise floor, and robust evidence checks",
    "svg": "https://raw.githubusercontent.com/overengineeringstudio/effect-utils/ci-measurement-assets/ci-measurements/pr-743/13355c3a8dc2c3cba0244ddbaee346c2977109ff/run-26959333385-attempt-1/ci-measurements.svg",
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  },
  "measurements": [
    {
      "id": "task_check_quick_warm",
      "label": "Warm cached check:quick",
      "group": "devenv / quality gates",
      "path": [
        "devenv",
        "quality gates",
        "check:quick"
      ],
      "groupPath": [
        "devenv",
        "quality gates"
      ],
      "status": "pass",
      "direction": "improved",
      "gateable": true,
      "gateReason": "eligible",
      "confidence": "within_budget",
      "comparisonMode": "paired",
      "unit": "seconds",
      "baseline": 2.934,
      "current": 2.635,
      "delta": -0.2990000000000004,
      "ratio": 0.8980913428766188,
      "semanticImpactScore": -0.047716428084526204,
      "semanticImpactKind": "improvement",
      "baselineSources": 5,
      "currentSamples": 5,
      "pairedSamples": 5,
      "evidenceDeltaLower": -2.913,
      "evidenceDeltaUpper": -0.014,
      "pairedEvidenceQuantile": 0.25,
      "dimensions": {
        "workload": "cached-no-op",
        "taskCacheMode": "warm",
        "probe": "task_check_quick_warm",
        "probeLabel": "Warm cached check:quick",
        "status": 0,
        "sampleCount": 11,
        "warmupCount": 1,
        "measuredSampleCount": 5,
        "pairedSampleCount": 5,
        "pairedOrderProtocol": "balanced-seeded-alternating-v1",
        "pairedOrderSeed": "26959333385-1-7a13a86e518efd3d8f237e646473289881edb6c4",
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        "aggregation": "median",
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        "devenvRev": "2cf62a010000b70f15c78a72761fad7c9e6fb47a",
        "otelServiceName": "devenv-perf-ci"
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    },
    {
      "id": "nix.closure.nar_size",
      "label": "Total closure size",
      "group": "nix / closures / packages",
      "path": [
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        "genie",
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        "nix closure"
      ],
      "groupPath": [
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      "status": "pass",
      "direction": "regressed",
      "gateable": true,
      "gateReason": "eligible",
      "confidence": "within_budget",
      "comparisonMode": "budget",
      "unit": "bytes",
      "baseline": 533018992,
      "current": 561373688,
      "delta": 28354696,
      "ratio": 1.0531964084311654,
      "semanticImpactScore": 0,
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      "baselineSources": 22,
      "currentSamples": 1,
      "pairedSamples": 0,
      "evidenceDeltaLower": 17694316.16,
      "evidenceDeltaUpper": 39015075.84,
      "pairedEvidenceQuantile": 0.25,
      "dimensions": {
        "bucket": "total"
      }
    },
    {
      "id": "nix.closure.serialized_nar_size",
      "label": "Total serialized NAR size",
      "group": "nix / closures / packages",
      "path": [
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        "total",
        "serialized-nar-size",
        "nix closure diagnostics"
      ],
      "groupPath": [
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      "status": "pass",
      "direction": "regressed",
      "gateable": true,
      "gateReason": "eligible",
      "confidence": "within_budget",
      "comparisonMode": "diagnostic",
      "unit": "bytes",
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      "semanticImpactScore": 0,
      "semanticImpactKind": "neutral",
      "baselineSources": 21,
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      "pairedSamples": 0,
      "evidenceDeltaLower": -24947203.200000003,
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      "dimensions": {
        "bucket": "total",
        "sizeKind": "nar"
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    },
    {
      "id": "nix.closure.nar_size",
      "label": "Total closure size",
      "group": "nix / closures / packages",
      "path": [
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      "groupPath": [
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      ],
      "status": "pass",
      "direction": "unchanged",
      "gateable": true,
      "gateReason": "eligible",
      "confidence": "noise_floor",
      "comparisonMode": "budget",
      "unit": "bytes",
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      "delta": 2518864,
      "ratio": 1.0169226298318632,
      "semanticImpactScore": 0,
      "semanticImpactKind": "neutral",
      "baselineSources": 22,
      "currentSamples": 1,
      "pairedSamples": 0,
      "evidenceDeltaLower": -7966896,
      "evidenceDeltaUpper": 13004624,
      "pairedEvidenceQuantile": 0.25,
      "dimensions": {
        "bucket": "total"
      }
    },
    {
      "id": "nix.closure.serialized_nar_size",
      "label": "Total serialized NAR size",
      "group": "nix / closures / packages",
      "path": [
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        "closures",
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        "megarepo",
        "total",
        "serialized-nar-size",
        "nix closure diagnostics"
      ],
      "groupPath": [
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      ],
      "status": "pass",
      "direction": "regressed",
      "gateable": true,
      "gateReason": "eligible",
      "confidence": "within_budget",
      "comparisonMode": "diagnostic",
      "unit": "bytes",
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      "semanticImpactScore": 0,
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      "baselineSources": 21,
      "currentSamples": 1,
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      "evidenceDeltaLower": -12365725.600000001,
      "evidenceDeltaUpper": 17403453.6,
      "pairedEvidenceQuantile": 0.25,
      "dimensions": {
        "bucket": "total",
        "sizeKind": "nar"
      }
    },
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github-actions Bot added a commit that referenced this pull request Jun 4, 2026
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