Claim LD06-SL-C12 (v1.0)
When four maintainers of three repositories reviewed 296 AI-written pull requests that had passed SWE-bench Verified’s automated tests, roughly half would not have been merged; on average, maintainer merge rates, scored relative to the 68% at which the same maintainers would merge the human-written patches actually merged, ran about 24 percentage points below the benchmark scores.
Provenance and status
- Claim type
- ESTIMATE (as printed: “ESTIMATE”)
- Publication status
- ELIGIBLE (QUALIFIED) (as printed: “ELIGIBLE WITH QUALIFIER”)
- Verification state
- CONTENT_VERIFIED_PRIMARY (as printed: “CONTENT VERIFIED”; verified by: UNKNOWN)
- Does not license
- A capability limit (agents could not iterate on feedback; the authors say they are not claiming benchmarks have no signal); results for other benchmarks
- Source (field 6, as printed)
- Whitfill, Wu, Becker & Rush, “Many SWE-bench-Passing PRs Would Not Be Merged into Main,” METR research note, 10 March 2026
- Source type (field 7)
- INDEPENDENT_RESEARCH_REPORT (as printed: “Research nonprofit post”)
- Institutional position
- Independent research nonprofit (METR)
- Maturity (claim evidence / publication maturity)
- EMERGING (as printed: “EMERGING”)
- Recorded date
- 2026-10-15
- Currentness / correction
- This is the current version. No correction or concern relation is recorded on its Sources.
Version
Pinned version v1.0 (entry LD06-SL-C12--v1.0) — this page never floats to newer evidence.
This pinned version is also the current version.
Pinned Sources (field 6, version-specific)
- “Whitfill, Wu, Becker & Rush, “Many SWE-bench-Passing PRs Would Not Be Merged into Main,” METR research note, 10 March 2026” → SRC-SL-WHITFILL-WU-BECKER-RUSH-METR-2026-03-10--v1.0 — Whitfill, Wu, Becker & Rush, “Many SWE-bench-Passing PRs Would Not Be Merged into Main,” METR research note, 10 March 2026; class INDEPENDENT_RESEARCH_REPORT (explicit public provenance pin)
All 25 canonical Claim fields (raw values and normalized values)
| # | Canonical field | Canonical value (verbatim) | Normalized (Claim Value Vocabulary v1.0.2) |
|---|---|---|---|
| 1 | CLAIM ID | LD06-SL-C12 | — |
| 2 | PUBLIC-FACING CLAIM | When four maintainers of three repositories reviewed 296 AI-written pull requests that had passed SWE-bench Verified’s automated tests, roughly half would not have been merged; on average, maintainer merge rates, scored relative to the 68% at which the same maintainers would merge the human-written patches actually merged, ran about 24 percentage points below the benchmark scores. | — |
| 3 | CLAIM TYPE | ESTIMATE | base_types: ESTIMATE |
| 4 | RESEARCH STRAND | A — Benchmark validity and measurement | — |
| 5 | MATURITY | EMERGING | states: EMERGING |
| 6 | SOURCE | Whitfill, Wu, Becker & Rush, “Many SWE-bench-Passing PRs Would Not Be Merged into Main,” METR research note, 10 March 2026 | source_ids: SRC-SL-WHITFILL-WU-BECKER-RUSH-METR-2026-03-10 |
| 7 | SOURCE TYPE | Research nonprofit post | classes: INDEPENDENT_RESEARCH_REPORT |
| 8 | INSTITUTIONAL POSITION | Independent research nonprofit (METR) | — |
| 9 | SCOPE | Three SWE-bench Verified repositories; agents from mid-2024 to mid/late 2025 | — |
| 10 | DESIGN | Maintainer review of agent patches, adjusted for noise using human-written patches that were actually merged | — |
| 11 | SAMPLE / DATASET | 296 AI-generated pull requests and 47 human “golden” patches | — |
| 12 | MODEL / TOOL / VERSION | Several agents released from mid-2024 to late 2025 | — |
| 13 | COMPARATOR | The benchmark’s automated grader; maintainers’ decisions on golden patches | — |
| 14 | MAIN RESULT | About half of test-passing patches not mergeable; merge decisions about 24 points below SWE-bench scores, with all scores reported as a percentage of the 68% golden-patch baseline; improvement 9.6 points a year slower, a result the authors call shakier | — |
| 15 | INFERENTIAL TARGET | How far one coding benchmark’s score predicts work an organization would accept | — |
| 16 | DOES NOT LICENSE | A capability limit (agents could not iterate on feedback; the authors say they are not claiming benchmarks have no signal); results for other benchmarks | — |
| 17 | VERIFICATION STATE | CONTENT VERIFIED | state: CONTENT_VERIFIED_PRIMARY · verified_by: UNKNOWN |
| 18 | LIMITATIONS | A research note with less review than METR’s research posts; four maintainers; hypothetical merge decisions; 3 of SWE-bench Verified’s 12 repositories (95 of 500 issues); historical issues in their original repository state, reviewed without continuous-integration tools | — |
| 19 | CONTRADICTORY / SUPPORTING SOURCES | Consistent with METR’s earlier review of 15 agent pull requests (LD-03 debate) and with LD06-SL-C08 | — |
| 20 | GEOGRAPHY / LANGUAGE | Not checked / English | — |
| 21 | DISTRIBUTIONAL LEDGER | Not analysed in this claim | — |
| 22 | R01 / FIELD-MAP LINKS | LD-06, D4b | — |
| 23 | WHAT WOULD CHANGE THIS CLAIM? | Larger maintainer reviews with current agents allowed to iterate | — |
| 24 | PUBLICATION STATUS | ELIGIBLE WITH QUALIFIER | state: ELIGIBLE · qualifiers: QUALIFIED |
| 25 | RECORDED DATE | 2026-10-15 | — |
Field 22 references resolved against Field Map v0.2: LD-06 (LIVING_DEBATE); D4b (SUB_AREA)
Cited by Living Debate versions
Research-of-record provenance
Materialized by sociolens-materializer 0.6.0 at 2026-09-28T20:00:00.000Z; normalization contract SocioLens — Claim Value Vocabulary v1.0.2 — Pre-Spike Materialization Contract (v1.0.2). Content seal SHA-256 140a110ba29dfb68aa2f247adc9d83aa9c869027f25592350579ef90b1563649.
Repository-authored inputs (not Drive exports)
- SocioLens claim — LD06-SL-C12 v1.0 (v1.0) — written in the SocioLens repository by Project Lead (Claude, AI) on 2026-10-15; no Drive identity exists. Authority: AGENTS.md "Authority" (the Project Lead decides research content within the research-integrity rules) and the Owner's choice in the SocioLens project chat on 15 October 2026 to build the LD-06 debate; a new Claim, first version, written from the project's LD-06 source notes, checked against full texts or official abstracts. Block “ENTRY 12 — LD06-SL-C12” SHA-256
6beb2b381181e6480deb5d0941d8175140ceb50b05902ed68d3a72a0116d3ac1; fixturefixtures/authored/claims/LD06-SL-C12--v1.0.
Builder decisions (not Drive data)
- VERSION = v1.0 — basis: Claim version taken from the repository-authored claim fixture version (SocioLens claim — LD06-SL-C12 v1.0); the first version of a new Claim of the LD-06 debate
- CURRENT_POINTER = true — basis: repository-authored claim "SocioLens claim — LD06-SL-C12 v1.0" (Project Lead (Claude, AI), 2026-10-15); basis: AGENTS.md "Authority" (the Project Lead decides research content within the research-integrity rules) and the Owner's choice in the SocioLens project chat on 15 October 2026 to build the LD-06 debate; a new Claim, first version, written from the project's LD-06 source notes, checked against full texts or official abstracts
- FIELD_6_SOURCE_REFERENCE = SRC-SL-WHITFILL-WU-BECKER-RUSH-METR-2026-03-10--v1.0 — basis: field 6 of ENTRY 12 — LD06-SL-C12 cites "Whitfill, Wu, Becker & Rush, “Many SWE-bench-Passing PRs Would Not Be Merged into Main,” METR research note, 10 March 2026"; the only field-6 segment of this ClaimVersion's repository-authored ledger block.
- SOURCE_PROVENANCE_PIN = SRC-SL-WHITFILL-WU-BECKER-RUSH-METR-2026-03-10--v1.0 — basis: explicit version-pinned public provenance of this ClaimVersion (Amendment v1.2 §6): the pinned field-6 Source record "Whitfill, Wu, Becker & Rush, “Many SWE-bench-Passing PRs Would Not Be Merged into Main,” METR research note, 10 March 2026".