Getting it into your agent
This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.
/plugin marketplace add nagisanzenin/idiolect/plugin install idiolectWrote 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/nagisanzenin/idiolect/synthesize)<a href="https://agentmods.dev/skills/nagisanzenin/idiolect/synthesize"><img src="https://agentmods.dev/badge/skills/nagisanzenin/idiolect/synthesize/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/nagisanzenin/idiolect/synthesize"><img src="https://agentmods.dev/badge/skills/nagisanzenin/idiolect/synthesize.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 | $0.00067 | $0.00901 |
| Opus 5 | $0.00034 | $0.00451 |
| Sonnet 5 | $0.00013 | $0.00180 |
| Haiku 4.5 | $0.00007 | $0.00090 |
Grade A, and why
synthesize scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 11d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 44 lines — stays where its author put it; the contents beside it link to each section on GitHub.
/idiolect:synthesize — grow the roster
New voices are measured into existence, not adjective-ed. A synthesized voice ships with the same contract as the built-ins: full VOICE-SPEC frontmatter, stance engine, systematic error profile, three exemplars that scan clean, and distance ≥ 0.2 from every existing voice.
Setup
ROOT="${CLAUDE_PLUGIN_ROOT:-${CODEX_PLUGIN_ROOT:-$IDIOLECT_ROOT}}"
# unset everywhere (opencode)? ROOT = two directories up from this SKILL.md
IDIO="python3 $ROOT/scripts/idiolect.py"
$IDIO path # note custom_voices dir — new voices are written THERE, never into the plugin
Mode 1 — from a corpus
- Consent gate (one question, then done): if the corpus is the writing of a single identifiable person who is not the user, ask once: is this your own writing or writing you're authorized to model? If yes (or it's the user's own / mixed public material), proceed; note the answer in the profile's provenance line. The output is always a NEW fictional voice influenced by the corpus's stylistic features — this skill does not build impersonation kits of named people, and single-author clones overfit anyway.
- Concatenate the samples into one scratch file.
$IDIO fingerprint --file <f> --json > fp.json— this measures what adjectives can't: sentence-length distribution, burstiness, contraction rate, punctuation profile, casing habits, informal markers, favorite content words. $IDIO synth-scaffold --slug <slug> --from-fingerprint fp.json— a prefilled skeleton with the measured stylo numbers.- Spawn
idiolect-synthesizerwith: the scaffold, fp.json, the corpus file path, and$ROOT/docs/VOICE-SPEC.md. It drafts the full profile into the custom voices dir and runs the validate loop itself. (No subagent support on this platform? Do its job yourself following$ROOT/agents/idiolect-synthesizer.md.) - Verify the roster still separates:
$IDIO validate <slug>must pass;$IDIO distance --jsonmust show no pair under 0.2. If the new voice sits too close to an existing one, push the DIFFERENTIATING axes (error class, platform habitat, humor mechanics, openers) — not random noise. - Deliver: profile path, the three exemplars, scan scores, nearest-neighbor distance. The voice is immediately usable:
/idiolect:write <slug> ....
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.
- 11d ago First seen · 44 lines · 67 tokens per session scan A a92b8b596d95
synthesize is a skill published in the GitHub repository nagisanzenin/idiolect (23 stars, last pushed 2mo ago), licensed MIT. It adds 67 tokens to every session and 901 once invoked, about $0.0003 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 2026-09-01.
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