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Purpose: Record errors and near-misses in my AI-assisted personal planning. Owner: Kenji Watanabe Note: In personal planning, "failures" are often softer than in professional work —
but they still cost time, money, or wellbeing if not caught.
Failure Log
F-001 — AI gave a tax estimate without my real numbers
Date caught: 2025-08-20
Category: F3 — Numerical Error
What happened: I asked AI to help me think about whether to increase RRSP
contributions. AI said "based on a typical salary around $90K you'd save about
$1,200–1,500 in taxes." This was not based on my actual numbers. AI invented a
plausible range.
Impact: I almost made a contribution decision based on the estimate.
When I checked with my accountant, my marginal rate and situation were
different enough that the figure was meaningfully wrong.
Root cause: I hadn't set up canonical-numbers.md yet. No constraint on AI
making estimates.
Fix: Got real numbers from accountant. Added rule: AI does not produce any
financial estimate unless based on canonical numbers.
System change: Created canonical-numbers.md. Added rule to running document.
Status: ✅ Resolved
F-002 — Pillar bleed: relocation logistics ate a career-focused session
Date caught: 2026-01-15
Category: F1 — Context Drift / Pillar Interference
What happened: Session was supposed to be focused on career: preparing
for Fenwick interview process. AI was helpful at the start, then I mentioned
"oh and I'm also dealing with the move" — AI pivoted to logistics. The last
30 minutes of a 60-minute session was about Toronto neighbourhood research.
Impact: Career prep was incomplete. Had to do another session the next day.
Root cause: I opened the door by mentioning the move. AI responded helpfully
to what I said, not to the original session goal. No explicit pillar focus rule
was active.
Fix: None for that session. For next career session, focused it successfully.
System change: Added to running document rules: "One pillar per session
unless I explicitly open cross-pillar. If I mention another pillar in passing,
AI acknowledges and returns to focus."
Status: ✅ Resolved
F-003 — AI recommended a course of action on career decision
What happened: When discussing my 90-day plan at Fenwick, AI said
"you should push for a promotion path conversation early — managers respect
ambition shown in the first 90 days." This is career advice framed as a
directive. My career boundary says AI offers options, not directives.
Impact: No concrete harm — I noticed and flagged it. But if I'd been
less aware, I might have taken advice that wasn't right for my specific
manager and culture.
Root cause: No explicit prompt constraint in that session. AI defaulted
to helpful advice-giving mode.
Fix: AI used ARGUMENT FLAG correctly when prompted to ("I am suggesting X —
this is a recommendation, do you want to accept it?"). I declined.
System change: Added explicit constraint to session prompts: "You may offer
options but not recommend what I should do on personal career, health, or
financial decisions."
Status: ✅ Resolved
Near-Misses
Date
What was caught
Who caught it
Action
2025-09-10
AI suggested a specific investment fund by name
Kenji flagged immediately
Replaced with category discussion; reminded AI of investment boundary
2026-01-30
AI described knee pain management advice as if providing medical guidance
Kenji flagged
Redirected to "here's what physiotherapists typically suggest" framing
2026-02-15
AI included a "compare yourself to peers your age" savings benchmark without being asked
Kenji flagged
Reminded AI: track against own baseline only (Principle 4)