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## Problem Every PR that touches `public/` files requires manually bumping cache buster timestamps in `index.html` (e.g. `?v=1775111407`). Since all PRs change the same lines in the same file, this causes **constant merge conflicts** — it's been the #1 source of unnecessary PR friction. ## Solution Replace all hardcoded `?v=TIMESTAMP` values in `index.html` with a `?v=__BUST__` placeholder. The Go server replaces `__BUST__` with the current Unix timestamp **once at startup** when it reads `index.html`, then serves the pre-processed HTML from memory. Every server restart automatically picks up fresh cache busters — no manual intervention needed. ## What changed | File | Change | |------|--------| | `public/index.html` | All `v=1775111407` → `v=__BUST__` (28 occurrences) | | `cmd/server/main.go` | `spaHandler` reads index.html at init, replaces `__BUST__` with Unix timestamp, serves from memory for `/`, `/index.html`, and SPA fallback | | `cmd/server/helpers_test.go` | New `TestSpaHandlerCacheBust` — verifies placeholder replacement works for root, SPA fallback, and direct `/index.html` requests. Also added tests for root `/` and `/index.html` routes | | `AGENTS.md` | Rule 3 updated: cache busters are now automatic, agents should not manually edit them | ## Testing - `go build ./...` — compiles cleanly - `go test ./...` — all tests pass (including new cache-bust tests) - `node test-frontend-helpers.js && node test-packet-filter.js && node test-aging.js` — all frontend tests pass - No hardcoded timestamps remain in `index.html` --------- Co-authored-by: Kpa-clawbot <259247574+Kpa-clawbot@users.noreply.github.com> Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Co-authored-by: you <you@example.com>