https://ngpestelos.com/writing/ 2026-09-04T01:55:09Z Nestor G Pestelos Jr https://ngpestelos.com/writing/adversarial-review-prompt-claude-code-codex/

The adversarial review prompt I run as a Claude Code skill, with an install path for Codex. Point it at a plan or diff, and loop until it says PROCEED. Template repository: ngpestelos/adversarial-review.

2026-09-04T00:00:00+08:00 https://ngpestelos.com/writing/five-checks-against-motivated-reasoning/

Wanting a thing to be true and it actually being true feel identical from the inside. Five checks catch the gap: name the preference first, ask what would falsify the claim, use a confidence number, apply the same skepticism to sources you like and dislike, and treat certainty itself as a cost. Three of the five trace to published research; two are my own synthesis.

2026-08-24T00:00:00+08:00 https://ngpestelos.com/writing/the-employee-you-cant-stop-managing/

Treating AI agents like employees shifts software from static tools into collaborative relationships. But without strict systems discipline, ephemeral boundaries, and hard concurrency caps, it turns the solo builder…

2026-08-21T00:00:00+08:00 https://ngpestelos.com/writing/what-actually-buys-you-the-power-to-say-no/

One employer is a single point of failure. But a handful of clients isn't a diversified portfolio either. It's correlated risk. The actual lever behind "walk away" power is savings and marketable skills…

2026-08-21T00:00:00+08:00 https://ngpestelos.com/writing/meat-proxy-problem/

Forwarding an AI's answer unread, with nothing else checking the claim, severs accountability. Telling people to validate output will not fix that. Review culture already rubber-stamps real code. The fix has to survive the same incentives.

2026-08-19T00:00:00+08:00 https://ngpestelos.com/writing/instapay-is-not-ach/

BSP calls InstaPay an ACH. That word is a local label for a retail scheme. Nacha's ACH is a batch file network that can push and pull. PESONet is the Philippine batch sibling. InstaPay is a third shape.

2026-08-18T00:00:00+08:00 https://ngpestelos.com/writing/build-source-of-truth-before-index/

The default move for AI memory is a vector database first. Below context-window scale, that is backwards. Build a human-readable, editable source of truth, then layer search, graph structure, and agent access on top as rebuildable derivations.

2026-08-18T00:00:00+08:00 https://ngpestelos.com/writing/us-and-philippine-payment-rails/

The Fed names four public rails: currency, checks, ACH, and Fedwire. FedNow sits beside ACH. BSP names five designated systems. Cards sit on neither list. Pair the jobs, not the brand names.

2026-08-18T00:00:00+08:00 https://ngpestelos.com/writing/payments-glossary/

Word list for the rest of this series. Each heading is a stable address on this site. InstaPay is not RTGS. A card authorization is not a transfer.

2026-08-18T00:00:00+08:00 https://ngpestelos.com/writing/credit-cures-plagiarism-not-permission/

Citing sources legitimizes borrowing as a creative practice. It does not resolve copyright permissions, and it does not cover transformational creativity that changes domain rules instead of recombining parts.

2026-08-17T00:00:00+08:00 https://ngpestelos.com/writing/metric-already-happened-upstream/

The number you're staring at almost always already happened elsewhere or earlier. It rarely has one clean cause. Fix a real contributor instead of reacting to the metric, and expect that fix to expire too.

2026-08-15T00:00:00+08:00 https://ngpestelos.com/writing/positioning-demotes-prediction/

Positioning over predicting is right, but incomplete. It swaps a guess about outcomes for a guess about timing. Calibrated forecasting is the real exception; timing judgment is the real cost.

2026-08-14T00:00:00+08:00 https://ngpestelos.com/writing/ledger-that-stayed-empty/

Nine security issues got fixed and merged today. Seven never touched my commitments ledger; nobody was owed a fix on a deadline. Two were already on the ledger, a promise to test the system,…

2026-08-14T00:00:00+08:00 https://ngpestelos.com/writing/career-ceiling-i-was-worried-about-already-existed/

A pro athlete's career has a real ceiling, usually in their mid-thirties, not because they get worse at the game but because a body only holds up so long. Sean Goedecke argued software engineering might be entering…

2026-08-14T00:00:00+08:00 https://ngpestelos.com/writing/triffins-dilemma-escape-doesnt-work/

I spent a long session with Grok working through Triffin's Dilemma: the old observation that a country issuing the world's reserve currency must send out more dollars than it takes back…

2026-08-14T00:00:00+08:00 https://ngpestelos.com/writing/scanner-that-feeds-pipeline/

I maintain more repos than I can check by hand. A small system called portfolio-ops watches all of them, runs one deterministic scan, and turns whatever it finds into one of three narrow requests. The pipeline from…

2026-08-13T00:00:00+08:00 https://ngpestelos.com/writing/nine-security-issues-zero-lines-i-wrote/

Nine open findings from a security audit on a Go CLI tool. I assigned each issue to an autonomous background agent running a full plan-to-PR pipeline. I wrote zero lines of code. I merged all nine pull requests in…

2026-08-12T00:00:00+08:00 https://ngpestelos.com/writing/agency-dims-as-the-timeframe-collapses/

Agency operates as a decaying function of time rather than a fixed personal trait.

2026-08-11T00:00:00+08:00 https://ngpestelos.com/writing/ai-writes-code-plan-becomes-work/

When AI collapses the cost of coding, Fred Brooks's essential complexity (deciding what to build) becomes most of the job. The plan is the authored artifact now, not bureaucratic upfront design, but unread code still ships bugs.

2026-08-11T00:00:00+08:00 https://ngpestelos.com/writing/half-agent-infrastructure-depreciating-asset/

Agent infrastructure has two clocks. Substrate changes when your problem changes. Scaffolding can expire with the next model release.

2026-08-02T00:00:00+08:00 https://ngpestelos.com/writing/agent-didnt-get-dumber-chat-got-contaminated/

I have been living in long coding-agent sessions again. The kind of debug that needs a lot of context: many files, history in the thread, a problem that does not fit a five-minute prompt. Early turns feel sharp.…

2026-07-31T00:00:00+08:00 https://ngpestelos.com/writing/same-tunnel-ships-work-drops-room/

I was diagnosed on the autism spectrum in 2026. Late, after decades of treating the same pattern as personality: go dark, ship hard, miss the room.

2026-07-31T00:00:00+08:00 https://ngpestelos.com/writing/urgency-conscientiousness-better-marketing/

In November 2025, an account called Boring_Business [posted a claim](https://x.com/boringbiz_/status/1984295313499160756) that has been reposted, quoted, and independently reinvented ever since: "Pretty convinced…

2026-07-28T00:00:00+08:00 https://ngpestelos.com/writing/most-expensive-avoidance-looks-like-prudence/

Not every avoided thing is a debt. Walking away from a fight you would lose, declining the deal with bad math, closing the tab on the argument that goes nowhere. That is not cowardice; it is triage. As far as I…

2026-07-28T00:00:00+08:00 https://ngpestelos.com/writing/run-dead-internet-on-purpose/

Yesterday my knowledge system committed 192 changes. I made 7 of them.

2026-07-26T00:00:00+08:00 https://ngpestelos.com/writing/addiction-to-being-right-is-rarer-than-you-think/

You have probably heard of the backfire effect: correct someone's false belief and they dig in harder. It also mostly failed to replicate. Thomas Wood and Ethan Porter tested it across five experiments, more than…

2026-07-24T00:00:00+08:00 https://ngpestelos.com/writing/ai-rerunning-the-nuclear-script/

In April I saved a tweet from Danielle Fong: society never found out how much abundance nuclear energy could deliver, because the nuclear club "proposed to scale to mutually assured destruction, and close this off…

2026-07-24T00:00:00+08:00 https://ngpestelos.com/writing/debt-with-diff-attached/

AI made contributing free, so volume no longer signals effort. Judge a contribution by whether it removes uncertainty for the next person or dumps cost on them…

2026-07-24T00:00:00+08:00 https://ngpestelos.com/writing/orchestrator-identity/

Directing an AI forces an uncomfortable identity shift: from expert-who-implements to expert-who-verifies. Writing code was the visible anchor of 20 years of self-worth. The expertise requirement stays, but the visible effort disappears.

2026-07-24T00:00:00+08:00 https://ngpestelos.com/writing/selection-beats-execution-when-games-differ/

Google was not the first search engine. Facebook was not the first social network. Both won their markets anyway, which is a problem for the most popular piece of career advice going.

2026-07-23T00:00:00+08:00 https://ngpestelos.com/writing/engineer-the-downside-when-you-cannot-forecast/

Sam Zell built a multibillion-dollar fortune in real estate, and his method reduces to a rule simple enough to fit on a napkin: if the downside is small and the upside big, go; if the downside is big and the upside…

2026-07-23T00:00:00+08:00 https://ngpestelos.com/writing/triage-system-not-your-toolbox/

When something is slow, we reach for the tools we already know: `top`, the dashboard, the trace we understand. It feels like investigation. It is closer to hunting for your keys under the streetlight because the…

2026-07-23T00:00:00+08:00 https://ngpestelos.com/writing/anxiety-present-tense-problem/

> Returning to the present can be engagement or avoidance. If you use 'mindfulness' to hide from the feared thing, it's a safety behavior that feeds the anxiety. The exit is to name the dread, let it stand in the…

2026-07-21T00:00:00+08:00 https://ngpestelos.com/writing/havent-written-a-test-in-a-year/

I haven't written a test in a year.

2026-07-20T00:00:00+08:00 https://ngpestelos.com/writing/bottleneck-is-you/

Around the 300th note, I started seeing a pattern I wasn't looking for. I've been collecting notes on AI and software development for over a year. People from different companies and different decades of experience…

2026-07-19T00:00:00+08:00 https://ngpestelos.com/writing/your-review-checklist-has-never-been-reviewed/

A rule in your review checklist can be doing nothing, and you would never know. If a capable model would have caught the bug anyway, the rule sitting above it takes the credit. It looks load-bearing and is inert.…

2026-07-14T00:00:00+08:00 https://ngpestelos.com/writing/your-living-spec-is-still-lying/

The fix for spec rot has a nice symmetry. Specs go stale because humans write them once and never touch them again, so make the spec bidirectional: let the agent write back what it learns during implementation, and…

2026-07-14T00:00:00+08:00 https://ngpestelos.com/writing/tell-me-whats-wrong-with-it-isnt-review/

The adversarial-review prompt most people use is one sentence. Review this plan and tell me what's wrong with it. I wrote that sentence too. The version I run now is a 170-line file, and every line exists because the…

2026-07-13T00:00:00+08:00 https://ngpestelos.com/writing/cheap-code-expensive-context/

AI drives the cost of syntax toward zero, not the cost of engineering. Leverage shifts from writing code to holding customer context, defining problems, and verifying system architecture.

2026-07-12T00:00:00+08:00 https://ngpestelos.com/writing/polish-is-free-thinking-isnt/

Fluent writing was always a weak signal of good thinking, and language models now generate it for free. Real signal survives only in reasoning you can defend live and unassisted once the polish is gone.

2026-07-11T00:00:00+08:00 https://ngpestelos.com/writing/capacity-is-your-lowest-ceiling/

Ask an engineering team how much more traffic their service can take, and the answer usually comes back as a resource number. CPU is at forty percent, so there is room. Memory looks fine. The database is quiet.

2026-07-11T00:00:00+08:00 https://ngpestelos.com/writing/pattern-capture-auto-activating-skill-library/

Work discoveries usually vanish into conversation history or project notes. Pattern capture turns them into permanent, auto-activating expertise through a six-phase workflow: analyze the context, search your existing…

2026-07-10T00:00:00+08:00 https://ngpestelos.com/writing/agent-rail-war-red-herring/

Two stories get told about building infrastructure for AI agents. Both of them mislead.

2026-07-08T00:00:00+08:00 https://ngpestelos.com/writing/the-bugs-that-hide-between-your-agents/

A two-day adversarial review of my agent infrastructure found bugs that file-scoped review could not see: contract drift, fake success, dead states, and untrusted text reaching write authority.

2026-07-08T00:00:00+08:00 https://ngpestelos.com/writing/governing-delegation-scope-creep/

You asked for a small change and got a 12-file feature. You reverted it, burned 30 minutes, and now you hesitate before delegating anything.

2026-07-03T00:00:00+08:00 https://ngpestelos.com/writing/certainty-wellbeing-variable/

"Almost every form of misery I've encountered in text involves certainty curdling."

2026-07-03T00:00:00+08:00 https://ngpestelos.com/writing/second-brain-fails-you/

The moment you realize your perfectly organized Second Brain is useless.

2026-04-09T00:00:00+08:00 https://ngpestelos.com/writing/agents-plan-b-destroy-data/

An AI agent's locally rational escalation, git stash --include-untracked to unblock a pull, permanently destroyed 24 untracked files. A written rule in markdown was not enough. Only a PreToolUse hook that mechanically blocks the command prevents data loss.

2026-03-25T00:00:00+08:00 https://ngpestelos.com/writing/debug-system-not-prompt/

I started asking Claude why it gave me wrong output instead of reprompting. Not as a rhetorical exercise. As a direct question: "Explain step by step what you did to produce that output and what sources you…

2026-03-24T00:00:00+08:00 https://ngpestelos.com/writing/pkm-bottleneck-was-never-capture/

I've kept notes since 2003. Eight tools, two data losses, one rebuild from scratch. The collection grew steadily. My ability to use it didn't.

2026-03-24T00:00:00+08:00 https://ngpestelos.com/writing/basb-claude-code-setup/

You built the [Second Brain](https://www.buildingasecondbrain.com/). You have the Obsidian vault, the [PARA](https://www.buildingasecondbrain.com/para) folders, the [Readwise ](https://readwise.io)…

2026-03-19T00:00:00+08:00 https://ngpestelos.com/writing/enter-key-problem/

I've used Claude Code daily for over a year. It runs my knowledge vault, helps me modernize a legacy Rails codebase, and handles routine tasks I used to do manually. It is, genuinely, the most useful tool I've…

2026-03-19T00:00:00+08:00 https://ngpestelos.com/writing/deleting-24k-lines-ai-instructions/

I applied Elon Musk's Five-Step Algorithm to 257 Claude Code skills totaling 43,000+ lines. 29 batches later: 56%…

2026-03-17T00:00:00+08:00 https://ngpestelos.com/writing/new-art-learning/

I have spent most of my career building the kind of unconscious expertise that Josh Waitzkin describes in *The Art of Learning*: the final stage of a climb where skill drops below awareness and the expert mind just…

2026-03-08T00:00:00+08:00 https://ngpestelos.com/writing/developers-job-judgment-now/

I haven't written a test in a year.

2026-02-27T00:00:00+08:00 https://ngpestelos.com/writing/45/

The restaurant hasn't changed in thirty years. One uncle still owns it, another still manages it. The tables are the same, the menu is the same, the food tastes the way I remember it from when I was a teenager.

2026-02-13T00:00:00+08:00 https://ngpestelos.com/writing/parallelizing-sftp-downloads-ruby/

A vendor sync job had a 20GB file that took more than a day over single-connection SFTP. A CLI tool called lftp already does parallel downloads over SSH. But wrapping that in a proper Ruby gem with integrity…

2026-02-08T00:00:00+08:00 https://ngpestelos.com/writing/when-your-mcp-server-breaks/

*Published January 24, 2026*

2026-01-24T00:00:00+08:00 https://ngpestelos.com/writing/juanito-p-galvez-1928-2022/

Nestor G Pestelos Jr's tribute to his grandfather Juanito P. Galvez (1928–2022).

2022-10-26T00:00:00+08:00