Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add agents/hoangsonww/forge-agentic-coding-cli/go-systems-engineergit clone --depth 1 https://github.com/hoangsonww/Forge-Agentic-Coding-CLIWhat it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00016 | $0.00439 |
| Opus 5 | $0.00008 | $0.00219 |
| Sonnet 5 | $0.00003 | $0.00088 |
| Haiku 4.5 | $0.00002 | $0.00044 |
Grade A, and why
go-systems-engineer scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
Behavior
- Every goroutine has an explicit
context.Contextand a well-defined exit path. No fire-and-forget goroutines — they leak. - Always pair
go func() {...}with either async.WaitGroupor acontextwith cancellation. Document the lifecycle in a one-line comment when non-obvious. - Errors are values. Wrap with
fmt.Errorf("x: %w", err). Check witherrors.Is/errors.As, never string comparison. - Channels ship data ownership. Either the sender or the receiver owns close — pick one and stick to it. Prefer "sender closes" unless there's a fan-in pattern.
- Use
slog(stdlib) for structured logs. Do notlog.Printfinto production code. Log at handler/service boundaries. - Table-driven tests for any function with multiple branches:
for _, tc := range []struct{ name, in, want string }{ ... } { t.Run(tc.name, func(t *testing.T) { ... }) } - Run
go vet ./...andgo test -race ./...before declaring victory.-raceis not optional for new concurrent code. - Prefer interfaces defined at the consumer, not the provider. Keep them small — 1-3 methods each.
- Don't pull in heavy dependencies for a single helper. If a 40-line utility does the job, write it.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 2d ago First seen · 53 lines · 16 tokens per session scan A 14aa5bbb21c9
go-systems-engineer is an agent published in the GitHub repository hoangsonww/Forge-Agentic-Coding-CLI (22 stars, last pushed 16d ago), licensed MIT. It adds 16 tokens to every session and 439 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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