sync-upstream-radius

Development

Track and sync the upstream layeh.com/radius library to the org fork talkincode/radius (TR-F021/TR-F022). Use when a check finds new upstream commits, a protocol-library defect is suspected, or for routine dependency maintenance.

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Source SKILL.md: https://github.com/talkincode/toughradius/blob/HEAD/.agents/skills/sync-upstream-radius/SKILL.md

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Skill: Track & Sync the Upstream RADIUS Library

Feature IDs: TR-F021 / TR-F022 | Milestone: M7

Background

Core protocol library: layeh.com/radius (original repo https://github.com/layeh/radius).
Org fork: github.com/talkincode/radius (https://github.com/talkincode/radius).
Wiring: in go.mod
```
require layeh.com/radius v0.0.0-<pseudo>
replace layeh.com/radius => github.com/talkincode/radius v<tag>
```
i.e. the build actually uses the fork, while the layeh.com/radius import path stays unchanged.

When to use

Routine (weekly recommended) manual check of whether upstream layeh/radius has new commits.
When a protocol codec / attribute-handling / security defect is found or suspected.
During routine dependency maintenance.

Steps

Confirm the currently pinned version
```
grep -E "layeh.com/radius|talkincode/radius" go.mod
```
Record the fork tag the replace points to, and the upstream commit short SHA in the require pseudo-version.
Diff against upstream
- Original repo layeh/radius: review new commits since the pinned commit, e.g. via GitHub compare: https://github.com/layeh/radius/compare/<pinned_sha>...master, or git log <pinned_sha>.. in an upstream clone.
- Focus on: security fixes, attribute codec correctness, EAP / VSA / packet-parsing changes.
Assess the sync
- If an upstream fix is important and the fork lacks it: merge/cherry-pick it into the fork (talkincode/radius) and cut a new tag.
- Update this repo's go.mod replace to the new tag and run go mod tidy.
- If the fix does not affect this project's usage, record the "assessed, sync deferred" rationale (reply in the tracking issue).

Verify

go build ./...
go test ./...
go test -tags=integration -count=1 ./test/integration/...   # needs Postgres, see ../add-acceptance-test/SKILL.md
golangci-lint run

Regression protection: if the sync fixes a protocol defect, add a test that reproduces it to prevent future regressions.

Boundaries

Do not vendor or patch third-party library source directly in this repo; changes go through the fork repo.
replace points only to the trusted org fork; do not introduce unknown third-party branches.
Upgrades must be explained in the PR: upstream commit range, risk assessment, and whether protocol behavior is affected.

Acceptance

go.mod / go.sum are consistent, go mod tidy leaves no residue
Full + integration tests pass
The tracking issue records the sync decision (sync / defer + rationale)
PR references TR-F021 / TR-F022