Decisions, playbooks, notes, and open questions from the working wiki behind EdenFintech.https://devai.co.za/https://devai.co.za/decisions/ship-the-feedback-loop/https://devai.co.za/decisions/ship-the-feedback-loop/Why a one-click feedback widget plus an automatic audit-log bundle is the bit of infrastructure people skip, and how it's wired up in the wecoza-core plugin.Tue, 19 May 2026 00:00:00 GMThttps://devai.co.za/decisions/claude-tradingview-mcp/https://devai.co.za/decisions/claude-tradingview-mcp/The Claude/TradingView MCP is a technically real capability. It closes the compile loop conversationally. It does not touch the validation loop, and the validation loop is what determines whether a retail trader profits.Mon, 27 Apr 2026 00:00:00 GMThttps://devai.co.za/decisions/linkedin-engagement-tooling/https://devai.co.za/decisions/linkedin-engagement-tooling/Why I migrated topical-engagement discovery off Brave Search onto Interceptor (driving my own Brave session), and the ToS trade-off and resilience guards I'm running it under.Sun, 26 Apr 2026 00:00:00 GMThttps://devai.co.za/notes/quant-trader-vs-investor/https://devai.co.za/notes/quant-trader-vs-investor/Quant trader vs quant investor: the epistemic asymmetry between knowable-but-evaporating edges and durable-but-unverifiable ones.Sat, 25 Apr 2026 00:00:00 GMThttps://devai.co.za/open-questions/harness-vs-prompt-engineering/https://devai.co.za/open-questions/harness-vs-prompt-engineering/As base models get better at following loose prompts, does the leverage shift back to prompt-craft, or does it stay with the scaffolding around the agent? An open question about where the compounding return lives.Thu, 23 Apr 2026 00:00:00 GMThttps://devai.co.za/decisions/llms-behind-typed-adapters/https://devai.co.za/decisions/llms-behind-typed-adapters/LLM calls behind typed adapters, code-level information barriers, external prompts, provider-agnostic transport. An AI-engineering position.Wed, 22 Apr 2026 00:00:00 GMThttps://devai.co.za/decisions/postgres-alongside-wordpress/https://devai.co.za/decisions/postgres-alongside-wordpress/Why Postgres alongside WordPress, invariants in plpgsql triggers, operational data that outlives the CMS. A pattern from WeCoza development.Wed, 22 Apr 2026 00:00:00 GMThttps://devai.co.za/decisions/publishing-negative-results/https://devai.co.za/decisions/publishing-negative-results/Why I publish negative results, postmortems as the deliverable when research doesn't pan out. Evaluation discipline across shelved research projects.Wed, 22 Apr 2026 00:00:00 GMThttps://devai.co.za/decisions/stdlib-over-pandas-for-the-scanner/https://devai.co.za/decisions/stdlib-over-pandas-for-the-scanner/Why I use stdlib over pandas in the scanner core, dependencies as a drift surface, stability over ergonomics in production Python pipelines.Wed, 22 Apr 2026 00:00:00 GMThttps://devai.co.za/playbooks/adversarial-ai-review/https://devai.co.za/playbooks/adversarial-ai-review/Pipe your plan, code, or tests to a second AI from a different vendor for critical review. The findings you'd have missed come from a reader who isn't invested in the design choice.Wed, 22 Apr 2026 00:00:00 GMThttps://devai.co.za/playbooks/client-friendly-translations/https://devai.co.za/playbooks/client-friendly-translations/Every bug-fix update to a non-technical client is two paragraphs, zero jargon, a commit SHA, and a Trello tag. The template that keeps me from leaking 'nonce', 'capability', or '403' into client inboxes.Wed, 22 Apr 2026 00:00:00 GMThttps://devai.co.za/playbooks/file-driven-planning/https://devai.co.za/playbooks/file-driven-planning/Five phases. Each phase reads a file and writes a file. If an AI session crashes mid-phase, you resume from the last file written. Mixed-model workflow, Gemini review, Sonnet execute.Wed, 22 Apr 2026 00:00:00 GMThttps://devai.co.za/playbooks/knowledge-graph-vault/https://devai.co.za/playbooks/knowledge-graph-vault/Start with a research brief, end with a navigable Obsidian vault published as a public wiki. The iterative loop between them, with a convergence criterion that knows when to stop.Wed, 22 Apr 2026 00:00:00 GMThttps://devai.co.za/playbooks/playwright-wordpress/https://devai.co.za/playbooks/playwright-wordpress/A Playwright setup that logs in once, never clicks the Wipe All button, and treats a shortcode map as the single source of truth for routes. The specific shape I run against WeCoza.Wed, 22 Apr 2026 00:00:00 GMT