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 human-avatar/skills-for-humanity --skill s4h-linguistics-semantic-driftgit clone --depth 1 https://github.com/human-avatar/skills-for-humanityWrote 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/human-avatar/skills-for-humanity/s4h-linguistics-semantic-drift)<a href="https://agentmods.dev/skills/human-avatar/skills-for-humanity/s4h-linguistics-semantic-drift"><img src="https://agentmods.dev/badge/skills/human-avatar/skills-for-humanity/s4h-linguistics-semantic-drift/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/human-avatar/skills-for-humanity/s4h-linguistics-semantic-drift"><img src="https://agentmods.dev/badge/skills/human-avatar/skills-for-humanity/s4h-linguistics-semantic-drift.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00100 | $0.02078 |
| Opus 5 | $0.00050 | $0.01039 |
| Sonnet 5 | $0.00020 | $0.00416 |
| Haiku 4.5 | $0.00010 | $0.00208 |
Grade A, and why
s4h-linguistics-semantic-drift 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 9d 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 — 138 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Linguistics: Semantic Drift
Words do not hold still.
"Literally" now means "figuratively" in common usage. "Decimate" originally meant to kill one in ten; it now means to devastate. "Woke" migrated from an African-American vernacular expression of political awareness to a mainstream progressive identity marker to a political pejorative — in roughly fifteen years. These shifts are not merely interesting: they change what arguments are available, which coalitions are possible, and what policies feel legitimate.
Ludwig Wittgenstein's later philosophy provides the theoretical grounding: words do not have fixed meanings determined by their reference to the world. They have meanings determined by use — by the language games people play with them in particular contexts and communities. When the community changes, the game changes, and the word changes with it.
Semantic drift takes several forms. Natural drift is organic evolution through changing usage — inevitable, mostly benign, occasionally confusing. Concept creep, identified by Nick Haslam, is the expansion of a concept's boundaries, typically in psychology and social discourse: "trauma", "addiction", and "abuse" have all expanded substantially from their clinical origins, gaining explanatory power and losing diagnostic precision simultaneously. Deliberate semantic capture is strategic: political and commercial actors invest in changing what a word means because the word controls a contested domain. "Freedom", "natural", "sustainable", and "wellness" are all sites of ongoing definitional struggle.
This skill traces a word's semantic trajectory, identifies the mechanism of drift, and assesses the consequences of the shift.
Your Process
Step 1: Establish the Starting Point Identify the term or concept under analysis. Establish its origin meaning:
- The technical or etymological original (if relevant)
- The commonly understood meaning at a specific historical moment
- The formal or disciplinary definition if one exists
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.
- 9d ago First seen · 138 lines · 100 tokens per session scan A 5d6b91e6c88e
s4h-linguistics-semantic-drift is a skill published in the GitHub repository human-avatar/skills-for-humanity (223 stars, last pushed 1mo ago), licensed MIT. It adds 100 tokens to every session and 2,078 once invoked, about $0.0005 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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