Prompt Improver
severity1/claude-code-prompt-improver
This skill enriches vague prompts with targeted research and clarification before execution.
This skill should be used when the user asks about "biosimilar erosion", "Purple Book", "biologic exclusivity", "interchangeability", "how fast will [biologic] erode", "erosion curve", or needs the…
Install Biosimilar Erosion
$ npx skills add hh-health-AI/healthcare-equity --skill biosimilar-erosion -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install hh-health-AI/healthcare-equity biosimilar-erosion --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/hh-health-AI/healthcare-equity.git skills-src && mkdir -p .claude/skills && cp -r skills-src/modules/ip-exclusivity/skills/biosimilar-erosion .claude/skills/biosimilar-erosion && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "biosimilar-erosion" agent skill from https://github.com/hh-health-AI/healthcare-equity/tree/main/modules/ip-exclusivity/skills/biosimilar-erosion into .claude/skills/biosimilar-erosion/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "biosimilar-erosion", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/hh-health-AI/healthcare-equity/tree/main/modules/ip-exclusivity/skills/biosimilar-erosionType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add hh-health-AI/healthcare-equity --skill biosimilar-erosion -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install hh-health-AI/healthcare-equity biosimilar-erosion --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/hh-health-AI/healthcare-equity.git skills-src && mkdir -p .agents/skills && cp -r skills-src/modules/ip-exclusivity/skills/biosimilar-erosion .agents/skills/biosimilar-erosion && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "biosimilar-erosion" agent skill from https://github.com/hh-health-AI/healthcare-equity/tree/main/modules/ip-exclusivity/skills/biosimilar-erosion into .agents/skills/biosimilar-erosion/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "biosimilar-erosion", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add hh-health-AI/healthcare-equity --skill biosimilar-erosion -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install hh-health-AI/healthcare-equity biosimilar-erosion --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/hh-health-AI/healthcare-equity.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/modules/ip-exclusivity/skills/biosimilar-erosion .cursor/skills/biosimilar-erosion && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "biosimilar-erosion" agent skill from https://github.com/hh-health-AI/healthcare-equity/tree/main/modules/ip-exclusivity/skills/biosimilar-erosion into .cursor/skills/biosimilar-erosion/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "biosimilar-erosion", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/hh-health-AI/healthcare-equity.git --path modules/ip-exclusivity/skills/biosimilar-erosion--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add hh-health-AI/healthcare-equity --skill biosimilar-erosion -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install hh-health-AI/healthcare-equity biosimilar-erosion --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/hh-health-AI/healthcare-equity.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/modules/ip-exclusivity/skills/biosimilar-erosion .gemini/skills/biosimilar-erosion && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "biosimilar-erosion" agent skill from https://github.com/hh-health-AI/healthcare-equity/tree/main/modules/ip-exclusivity/skills/biosimilar-erosion into .gemini/skills/biosimilar-erosion/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "biosimilar-erosion", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install hh-health-AI/healthcare-equity biosimilar-erosionInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add hh-health-AI/healthcare-equity --skill biosimilar-erosion -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/hh-health-AI/healthcare-equity.git skills-src && mkdir -p .github/skills && cp -r skills-src/modules/ip-exclusivity/skills/biosimilar-erosion .github/skills/biosimilar-erosion && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "biosimilar-erosion" agent skill from https://github.com/hh-health-AI/healthcare-equity/tree/main/modules/ip-exclusivity/skills/biosimilar-erosion into .github/skills/biosimilar-erosion/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "biosimilar-erosion", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add hh-health-AI/healthcare-equity --skill biosimilar-erosion -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install hh-health-AI/healthcare-equity biosimilar-erosion --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/hh-health-AI/healthcare-equity.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/modules/ip-exclusivity/skills/biosimilar-erosion .opencode/skills/biosimilar-erosion && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "biosimilar-erosion" agent skill from https://github.com/hh-health-AI/healthcare-equity/tree/main/modules/ip-exclusivity/skills/biosimilar-erosion into .opencode/skills/biosimilar-erosion/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "biosimilar-erosion", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
biosimilar-erosion- GitHub stars
- 101
- Token cost
- ~753 tokens
- SKILL.md length
- 330 words
- Files
- 2 (incl. references)
- Skills in repo
- 72
- Repo updated
- First seen
- Licence
- MIT
At a glance
This skill should be used when the user asks about "biosimilar erosion", "Purple Book", "biologic exclusivity", "interchangeability", "how fast will [biologic] erode", "erosion curve", or needs the…
- Works in 8 steps: Establish the reference product's… → Count and qualify the entrants. Not all… → Determine the substitution mechanism,… → …
- Asks about biosimilar erosion
- SKILL.md covers Workflow and Not-automatic
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Biosimilar Erosion is an agent skill from hh-health-AI/healthcare-equity. This skill should be used when the user asks about "biosimilar erosion", "Purple Book", "biologic exclusivity", "interchangeability", "how fast will [biologic] erode", "erosion curve", or needs the post-LOE revenue slope for a biologic. Anchors prompt-library ID SUB-PHA-05.
Its SKILL.md is about 750 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files, including reference files (for example `references/erosion-analogues.md`).
It sits in AI & LLM Engineering, covering Prompt engineering. The repository describes itself as: Synthesis engine for buy-side healthcare equity research. The licence is MIT.
When your agent uses it
- Asks about biosimilar erosion
- Biologic exclusivity
- Interchangeability
- How fast will [biologic] erode
Example prompts
- “biosimilar erosion”
- “Purple Book”
- “biologic exclusivity”
- “/biosimilar-erosion”
Workflow steps
8 steps, taken from the first numbered list in SKILL.md.
- Establish the reference product's position from the Purple Book
- Count and qualify the entrants. Not all approvals launch. Check for: launch
- Determine the substitution mechanism, which drives everything
- Model price and volume separately. Biosimilar competition is initially price-led
- Build the curve. Quarterly, from the entry date, with the shape justified by the
- Watch the defence. Reference-product sponsors deploy: authorised biosimilars,
- Instrument the curve. Once entry happens, replace assumption with observation
- Emit the brief.
What it can do on your machine
Read from SKILL.md and the folder at commit 6c7bda8. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Biosimilar Erosion loads about 753 tokens when it runs, and up to ~1.3k if it reads all its reference files. Until then it costs about 73 tokens; SKILL.md has 330 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
The full file from hh-health-AI/healthcare-equity at commit 6c7bda8, republished under its MIT licence (© hh-health-AI). 330 words, ~753 tokens.
Download SKILL.mdSave it as
.claude/skills/biosimilar-erosion/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.- name
- biosimilar-erosion
- description
- This skill should be used when the user asks about "biosimilar erosion", "Purple Book", "biologic exclusivity", "interchangeability", "how fast will [biologic] erode", "erosion curve", or needs the post-LOE revenue slope for a biologic. Anchors prompt-library ID SUB-PHA-05.
- metadata.version
- 0.1.0
- metadata.layer
- Competitive
Biosimilar erosion curve
Turn a biologic's exclusivity position and competitive set into a dated erosion curve that a revenue model can consume.
Workflow
- Establish the reference product's position from the Purple Book
(
scripts/purple_book.py): BLA number, first licensure date, reference-product exclusivity expiry, and any listed biosimilars with their licensure dates and interchangeability status. - Count and qualify the entrants. Not all approvals launch. Check for: launch announcements, settlement-driven launch dates, manufacturing capacity, and whether the entrant is a large player with contracting muscle or a small one that will discount without winning share.
- Determine the substitution mechanism, which drives everything:
- Interchangeable, pharmacy-dispensed → fastest erosion.
- Not interchangeable, physician-administered, buy-and-bill → slowest; erosion depends on ASP dynamics and the physician's reimbursement spread, not on the pharmacy.
- Payer-forced switching → step-shaped erosion at formulary dates (1 January is the usual step), not a smooth curve.
- Model price and volume separately. Biosimilar competition is initially price-led: the reference product often holds volume while conceding net price through rebates. A model that assumes volume loss will misread the first two years and then be surprised by the cliff when contracts finally flip.
- Build the curve. Quarterly, from the entry date, with the shape justified by the substitution mechanism and by two named analogue molecules with similar mechanics. Analogues do more work here than theory.
- Watch the defence. Reference-product sponsors deploy: authorised biosimilars, next-generation formulations (higher-concentration, subcutaneous, longer-acting), device improvements, and aggressive contracting that trades price for volume retention. Each changes the curve; name which ones are in play.
- Instrument the curve. Once entry happens, replace assumption with observation
via
rx-utilization→ sdud-trx-proxy and Medicare Part B/D spending dashboards. A curve that is not being checked against data quarterly is a guess with a chart. - Emit the brief.
Not-automatic
A biosimilar approval does not license an erosion assumption. Approval without launch, without interchangeability, or without contracting capacity produces very little erosion, and several approved biosimilars have never meaningfully launched.
Reference: references/erosion-analogues.md. Contract: ../../references/evidence-brief.md.
© hh-health-AI, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 1 other file (references) in modules/ip-exclusivity/skills/biosimilar-erosion of hh-health-AI/healthcare-equity.
- SKILL.md
- references/erosion-analogues.md
Open the folder on GitHubat commit 6c7bda8
Compare with similar skills
Biosimilar Erosion next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Biosimilar Erosion this skillhh-health-AI/healthcare-equity | 101 | — | ~753 | Automated safety check: Pass | MIT | |
| Prompt Improverseverity1/claude-code-prompt-improver | 1.9k | 1 repos | ~1.7k | Automated safety check: Pass | MIT | |
| Prompt Engineering Patternsynulihao/AgentSkillOS | 618 | 14 repos | ~1.7k | Automated safety check: Pass | None | |
| Patch CreationPiebald-AI/tweakcc | 2.5k | — | ~1.6k | Automated safety check: Pass | MIT | |
| Senior Prompt Engineermaslennikov-ig/claude-code-orchestrator-kit | 260 | 3 repos | ~1.4k | Automated safety check: Pass | Custom licence | |
| Codex Fable5baskduf/FableCodex | 437 | — | ~1.6k | Automated safety check: Pass | AGPL-3.0 |
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Categories
Questions about Biosimilar Erosion
What does Biosimilar Erosion do?
This skill should be used when the user asks about "biosimilar erosion", "Purple Book", "biologic exclusivity", "interchangeability", "how fast will [biologic] erode", "erosion curve", or needs the…. Biosimilar Erosion is an agent skill from hh-health-AI/healthcare-equity. This skill should be used when the user asks about "biosimilar erosion", "Purple Book", "biologic exclusivity", "interchangeability", "how fast will [biologic] erode", "erosion curve", or needs the post-LOE revenue slope for a biologic.
When should I use Biosimilar Erosion?
Biosimilar Erosion fits situations like: asks about biosimilar erosion; biologic exclusivity; interchangeability; how fast will [biologic] erode.
How do I install Biosimilar Erosion in Claude Code?
Run `npx skills add hh-health-AI/healthcare-equity --skill biosimilar-erosion -a claude-code`. Or copy the skill folder (modules/ip-exclusivity/skills/biosimilar-erosion in hh-health-AI/healthcare-equity) into .claude/skills/biosimilar-erosion in your project. Claude Code loads it when a task matches its description.
How do I install Biosimilar Erosion in Codex?
Run `npx skills add hh-health-AI/healthcare-equity --skill biosimilar-erosion -a codex`. Or copy the skill folder (modules/ip-exclusivity/skills/biosimilar-erosion in hh-health-AI/healthcare-equity) into .agents/skills/biosimilar-erosion in your project. Codex loads it when a task matches its description.
Can I use Biosimilar Erosion in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add hh-health-AI/healthcare-equity --skill biosimilar-erosion -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/biosimilar-erosion, .gemini/skills/biosimilar-erosion, .github/skills/biosimilar-erosion and .opencode/skills/biosimilar-erosion in your project.
What does Biosimilar Erosion need to run?
SKILL.md names no scripts, command-line tools or credentials: Biosimilar Erosion is instructions for the agent only.
Does Biosimilar Erosion access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Biosimilar Erosion safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Biosimilar Erosion use?
Biosimilar Erosion is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Biosimilar Erosion use?
About 753 tokens (SKILL.md is roughly 3k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 505 tokens, read only when the agent opens those files.
What are the alternatives to Biosimilar Erosion?
Skills that share tags, products or a category with Biosimilar Erosion: Prompt Improver (severity1/claude-code-prompt-improver, 1.9k stars), Prompt Engineering Patterns (ynulihao/AgentSkillOS, 618 stars), Patch Creation (Piebald-AI/tweakcc, 2.5k stars) and Senior Prompt Engineer (maslennikov-ig/claude-code-orchestrator-kit, 260 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Biosimilar Erosion?
hh-health-AI (a GitHub user) maintains it in hh-health-AI/healthcare-equity, which has 101 GitHub stars. The repository holds 72 skills in this directory. The repository was last updated on October 8, 2026.
Source: hh-health-AI/healthcare-equity on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.