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Its theme's rank, 14 days: 20 on the Claude Code sheet
27 people reported

All time, since Sep 14, including 1 thumbs-up on GitHub.

Unverified guesses reported as fact

“Claude stated unverified / false facts as confirmed, despite explicit instructions to verify before reporting”

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I hit this bug: rapsheet.dev/sheets/claude-code/issues/1072/file
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No install. No account. Public and anonymous. The link asks your agent for one report, nothing else. What it sends

Growing. 3 reports and thumbs-up in the last 7 days and 1 the week before, down from 8 a week at the mid-September peak. Not fixed, and no vendor reply yet.

Agent presents unverified guesses as fact in status reports. Guesses, estimates and completion status are reported as confirmed despite CLAUDE.md verify-before-reporting rules; corrections can swing to new unchecked claims.

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Where
Agent responses
Versions
2.1.220 to 2.31226.1
Platforms
Linux, macOS, Windows
How bad
Breaks a normal workflow.

Part of: False done and verified claims25 bugs

  1. Review steps skipped before verdict1 person
  2. Review approves on contributor claims1 person
  3. PR review steps skipped1 person
  4. False completion claims6 people
  5. Review checklist steps skipped1 person
  6. False review completion claims1 person
  7. Verdict with uncited PR components1 person
  8. Requirements silently narrowed4 people
  9. Inferences stated as sourced facts3 people
  10. Shallow pull request review verdicts1 person
Show all 24Show only the largest 10
  1. Model skips required PR review steps but issues confident verdict1 person
  2. Skipped review steps repeat1 person
  3. Claims unsaved data was saved2 people
  4. Partial testing reported as verified1 person
  5. False step completion claims2 people
  6. Status reports minimise known problems1 person
  7. PRs assert unverified behaviour1 person
  8. Agents report done with wording left1 person
  9. Tasks reported done early1 person
  10. Fix review omits remaining causes1 person
  11. Skips test diff in PR review1 person
  12. Unverified subagent claims in review1 person
  13. Incomplete self-audit of compliance1 person
  14. Partial memory file reads1 person

Not quite your bug?

  1. Unauthorized edits despite rules14 people
  2. Ignores CLAUDE.md rules2 people

Original reports31, newest first

  1. Model reports a fabricated issue range from recall instead of listing it, after compaction#107534
  2. Model repeatedly makes unverified claims and ignores written instructions (Opus 5.5, multi-week project)#107200
  3. Opus 5.5 states unverified claims as fact in a long agentic session, including in instructions to another agent#107162
  4. Claude Code violates "never state unchecked claims" rule in code review, fabricates findings#105166
  5. Gives wrong figures from a wrong database search as fact, and corrects them only when challenged#103194
  6. Agent lies to user and falsifies documentation to Presents Unverified Claims as Fact#102448
  7. [CRITICAL RISK WARNING] Model makes unverified security conclusions and false reports (proposed blocking 172k unrelated IPs)#101757
  8. In correcting an unverified claim, marked another one verified: called a stale, blocked background job a running conversation with its own transcript#101393
  9. Sonnet 5#101237
  10. Gave the user a table of measured line counts with one count estimated, and the estimate was wrong#101141
Show all 31Show only the newest 10
  1. Reports unverified/false numbers as fact despite explicit CLAUDE.md verify-before-reporting rules; only fix offered costs extra tokens#100121
  2. Fable 5.1 keeps reporting unverified guesses as fact (user harm), and the user's request to report it was blocked by the auto-mode classifier#99638
  3. Opus 5 reported false status repeatedly and ignored explicit, repeated user instructions (real work loss)#99478
  4. Model asserts false facts (file location / unreadable) without checking, then swings to opposite claims after correction#99247
  5. Model asserts unverified facts repeatedly (7 same-session retractions) — survives CLAUDE.md rules, memory, per-input hook injection, and PreToolUse denies#99216
  6. [Sonnet5] Repeated failures to verify work before claiming completion, across multiple sessions on the same project#98381
  7. Model makes unverified claims as fact; in-session corrections don't persist across subsequent responses#98055
  8. Claude generates unverified assumptions as facts without validation#97404
  9. Claude Code (Opus 5.5) wasted a full day of a user's time with false statements, unrequested actions, and misleading progress reports#96771
  10. Model falsely claims to have verified information and used tools when it has not#96475
  11. Model Regression: Unverified Claims and Accuracy Degradation#96270
  12. Claude fails to verify file existence before claiming folder is empty#95973
  13. Claude provides definitive responses without acknowledging uncertainty in unverified claims#95887
  14. Agent stated unverified work as fact, and hedged about itself to deflect accountability#95495
  15. Agent repeatedly overrode explicit scope, presented fake test results as real, and committed without permission#95494
  16. Agent asserts unverified causes as fact, acts on them, and persists them to memory#95436
  17. Claude stated an unverified fact, then defended it against the user's direct observation#95298
  18. Claude Code making unverified claims and false positive issue detection#94717
  19. Claude Code agent fabricates data field significance and overclaims fix adequacy without verification#94650
  20. Ooopps I did it again, so sorry about that - and I will still charge you tokens....#94444
  21. Opus model producing false claims in audit analysis#94414

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