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 oh-rid/claude-code-plugin-ib --skill tax-loss-harvestgit clone --depth 1 https://github.com/oh-rid/claude-code-plugin-ibWrote 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/oh-rid/claude-code-plugin-ib/tax-loss-harvest)<a href="https://agentmods.dev/skills/oh-rid/claude-code-plugin-ib/tax-loss-harvest"><img src="https://agentmods.dev/badge/skills/oh-rid/claude-code-plugin-ib/tax-loss-harvest/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/oh-rid/claude-code-plugin-ib/tax-loss-harvest"><img src="https://agentmods.dev/badge/skills/oh-rid/claude-code-plugin-ib/tax-loss-harvest.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 | $0.00060 | $0.01360 |
| Opus 5 | $0.00030 | $0.00680 |
| Sonnet 5 | $0.00012 | $0.00272 |
| Haiku 4.5 | $0.00006 | $0.00136 |
Grade A, and why
tax-loss-harvest scanned grade A with 1 finding 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 10d 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
curl -sk https://localhost:5000/v1/api/tickle How it starts
The opening of the file, as written. The whole thing — 150 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Tax-Loss Harvest — Solo Trader
Scan live IB positions for unrealized losses worth harvesting. Quick, actionable output.
Workflow
Step 0: Session check
curl -sk https://localhost:5000/v1/api/tickle
If not authenticated, stop and tell user to log in.
Step 1: Get account ID
curl -sk https://localhost:5000/v1/api/portfolio/accounts
Extract id from the first account. Store as $ACCT.
Step 2: Pull all positions with P&L
curl -sk "https://localhost:5000/v1/api/portfolio/$ACCT/positions/0"
Each position returns: ticker, conid, position, mktValue, avgCost, avgPrice,
unrealizedPnl, realizedPnl, assetClass.
Step 3: Filter harvest candidates
From the positions response, select positions where:
unrealizedPnl < 0(has a loss)assetClass=STKorETF(stocks and ETFs only, skip options/futures)- Loss > $100 (ignore dust)
Sort by largest absolute loss first.
Step 4: Get YTD realized gains
curl -sk "https://localhost:5000/v1/api/portfolio/$ACCT/summary"
Look for realized P&L fields. If not available in summary, note that the user should check their IB Activity Statement for YTD realized gains.
Step 5: Estimate tax context
Calculate:
- Total harvestable losses = sum of all negative unrealizedPnl from candidates
- Net gain offset = min(harvestable losses, YTD realized gains) if realized gains known
- Ordinary income offset = min($3,000, remaining losses after gain offset)
- Estimated tax savings = gains offset x estimated cap gains rate + ordinary income offset x marginal rate
Tax jurisdiction matters. This skill defaults to US-style assumptions (IRS § 1091 wash sale, long/short-term distinction at 1 year, federal brackets). If the user is in another jurisdiction (EU, UK, etc.) the rules are different — UK uses 30-day "bed-and-breakfast", Germany has FIFO and different holding periods, etc. Always confirm jurisdiction before producing a final estimate. If unclear, ask.
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.
- 10d ago First seen · 150 lines · 60 tokens per session scan A 32c66282fa3a
tax-loss-harvest is a skill published in the GitHub repository oh-rid/claude-code-plugin-ib (5 stars, last pushed 3mo ago), licensed MIT. It adds 60 tokens to every session and 1,360 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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