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 skills add zgbrenner/agentcounsel --skill authority-synthesisgit clone --depth 1 https://github.com/zgbrenner/agentcounselWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/zgbrenner/agentcounsel/authority-synthesis)<a href="https://agentmods.dev/skills/zgbrenner/agentcounsel/authority-synthesis"><img src="https://agentmods.dev/badge/skills/zgbrenner/agentcounsel/authority-synthesis/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/zgbrenner/agentcounsel/authority-synthesis"><img src="https://agentmods.dev/badge/skills/zgbrenner/agentcounsel/authority-synthesis.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What 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 5.1 | $0.00074 | $0.03058 |
| Opus 5 | $0.00037 | $0.01529 |
| Sonnet 5 | $0.00015 | $0.00612 |
| Haiku 4.5 | $0.00007 | $0.00306 |
Grade A, and why
Authority Synthesis 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 7d 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.
How it starts
The opening of the file, as written. The whole thing — 136 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Authority Synthesis
Purpose
Synthesize a rule statement from multiple authorities for a single Question Presented. The output names the rule the authorities support, surfaces majority and minority lines explicitly, applies a temporal-confidence pass that downgrades the synthesis when the supporting authority is old or uncorroborated by recent decisions, and records each authority in a fixed Holding / Relevance / Weight block. It produces draft legal work product for attorney review; it is not legal advice, and it does not determine whether the synthesized rule binds the operative forum.
The most important disciplines this skill enforces:
- The rule statement matches what the authorities actually say. Synthesized rules that smooth over disagreement among authorities, ignore narrower holdings, or import dicta as rule are flagged and corrected before output.
- Majority and minority lines are named separately. A synthesis that presents only the supporting line and omits a meaningful minority position is a confirmation-bias failure; the skill explicitly searches the input set for contradicting authority and surfaces it.
- Temporal confidence is a first-class output. If the supporting authorities are concentrated in older cases without recent corroboration, the synthesis downgrades confidence and instructs the attorney to verify whether the rule has shifted.
- Authority count is capped per issue. A synthesis citing every case in the input set rather than the cases that actually support the rule is citation padding; the skill caps the per-Question authority set at the smallest that supports the synthesis and routes the remainder to the appendix or to attorney follow-up.
Use When
- A Question Presented has surfaced multiple authorities (cases, statutes, regulations, secondary sources) and the rule across them must be stated before the result is written into a memo.
- A
legal-research-memoDiscussion section requires a rule statement and the rule is not stated in one authority but emerges from several. - A litigation team has a set of cases on a doctrine and needs the rule synthesized before drafting a brief section.
- An advisory matter requires a rule statement that fairly accounts for split authority.
- A workflow has produced multiple case briefs (via
case-brief) and the next step is to synthesize their holdings into a rule.
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.
- 7d ago First seen · 136 lines · 74 tokens per session scan A 1238fbc5ac92
Authority Synthesis is a skill published in the GitHub repository zgbrenner/agentcounsel (19 stars, last pushed 1mo ago), licensed MIT. It adds 74 tokens to every session and 3,058 once invoked, about $0.0004 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 2026-09-03.
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