Green Belt Part C — Fintech Guardrails
Status: drafted · Time: 10 min · Audience: experienced-builder Outcome: Understand what Part C teaches, what Parts A and B muscle memory it assumes, and the order to walk it in.
Part C promise. By the end, you can ship into a Razorpay product repo with the full guardrail set running — redlines, proxy, regulator reflexes, threat awareness, the named reviewer skills, and a security-review subagent — and you can pass the Boss Fight that closes Green Belt.
Prerequisite. Parts A and B complete (Quests G-1 and G-2 both claimed). Part C reads thin without the craft and practices already in muscle memory. Time budget. ~2h40m for the seven modules; ~6h for Boss Fight G-B. Plan over a week.
What you’ll learn
Section titled “What you’ll learn”Part A taught the craft. Part B taught the practices. Part C teaches the rules: the redlines, the regulators, the threats, and the named reviewer skills that turn a Green-Belt-grade builder into one who can ship into product repos with confidence.
Seven modules, one Boss Fight, one badge. The Boss Fight closes the belt; the badge claims it.
The seven modules
Section titled “The seven modules”| § | Chapter | Pillar | Time |
|---|---|---|---|
| G.22 | What never goes into a prompt — the Razorpay redlines | Harness | 20 min |
| G.23 | The LLM proxy — what LiteLLM does and why every call routes through it | Harness | 25 min |
| G.24 | PII, PCI, RBI — the regulators, the reasons, the reflexes | Context | 30 min |
| G.25 | Prompt injection + output classifiers — threats and mitigations | Harness | 30 min |
| G.26 | The pre-ship-check skill — 6-layer gate before every PR | Harness | 20 min |
| G.27 | The Blade-compliance reviewer skill — file-granularity checks | Harness | 15 min |
| G.28 | Using a subagent for security review | Harness | 20 min |
Walk them in order on a first read. The redlines and proxy chapters (G.22–G.23) anchor the regulator and threat chapters (G.24–G.25); the named-skill chapters (G.26–G.28) build on both.
Boss Fight G-B and the badge
Section titled “Boss Fight G-B and the badge”Boss Fight G-B — The double-ship. Two merged PRs: a real product-repo feature with the five sub-requirements (scoped CLAUDE.md, at least one Playwright test, a clean pre-ship-check pass, the PR-guardrail used, a teammate’s sign-off on prompt craft) plus your Quest G-2 greenfield PR.
Green Belt badge. The belt-claim artefact with a cross-belt-synthesis reflection — which Part A craft compounded with which Part B practice, and what Part C guardrails caught.
What you can say after Part C
Section titled “What you can say after Part C”“I ship into product repos with the full guardrail set running. I know what never goes into a prompt, why every prompt routes through a proxy, what the regulators actually require, what attackers try, and which named skills review my work before I ask a human to.”
What comes next
Section titled “What comes next”Black Belt — building the leverage other teams run on. Authoring program-pinned skills, mentoring structured cohorts, contributing to the design system at the platform level.
Previous: ← Quest G-2 · Next: → G.22 The redlines