# io.github.JayOfemi/shikamaru (npm · @jayofemi/shikamaru)

Provably correct day-count, calendar, business-day, and schedule math, verified against QuantLib.

- Trust score: 67/100 (medium)
- Change this week: +23
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-06

## Components

- npm · `@jayofemi/shikamaru`: 67/100 (this document), [markdown](https://verifymcp.io/servers/jayofemi-shikamaru/jayofemi-shikamaru.md), [page](https://verifymcp.io/servers/jayofemi-shikamaru/jayofemi-shikamaru)

## Channel facts

- Registry: `npm`
- Package: `@jayofemi/shikamaru`
- Version: `1.1.1`
- Transport: `stdio`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-08-06.

- **Supply Chain Security**: 87/100
  - No malware found by supply-chain analysis.
  - Known CVEs were checked across the 95 of 99 dependencies we could resolve, so this covers what we could see, not the whole tree.
  - No install/post-install scripts declared.
  - Dependency health was assessed across the 95 of 99 dependencies we could resolve, so this covers what we could see, not the whole tree.
- **Provenance & Transparency**: 45/100
  - Source repository is publicly reachable at the declared URL.
  - Provenance check failed: no build-provenance attestation is published.
  - Clear OSI-approved license (MIT).
  - Actively maintained (last published 8 days ago).
  - Disclosure check failed: no security disclosure policy was found in the source repository.
- **Schema Quality & AI Usability**: 59/100
  - AI-judged instruction clarity (good).
  - Context-footprint check failed: tool/resource definitions use about 1184 tokens (~148/item across 8 items; 8 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 37/100
  - Stability observed for 11 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 96/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 87% of tool parameters carry a description.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### Claude

```bash
claude mcp add jayofemi-shikamaru -- npx -y @jayofemi/shikamaru
```

### Codex

```bash
codex mcp add jayofemi-shikamaru -- npx -y @jayofemi/shikamaru
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "jayofemi-shikamaru": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "@jayofemi/shikamaru"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add jayofemi-shikamaru --command npx --arg -y --arg @jayofemi/shikamaru
```

### Hermes

```yaml
mcp_servers:
  jayofemi-shikamaru:
    command: "npx"
    args: ["-y", "@jayofemi/shikamaru"]
```

### Other

```json
{
  "mcpServers": {
    "jayofemi-shikamaru": {
      "command": "npx",
      "args": [
        "-y",
        "@jayofemi/shikamaru"
      ]
    }
  }
}
```

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-08-06 (score 67, +1)

No change was recorded against any check on this day. Stability & Change Management went from 33 to 37. That category is still filling its 30-day observation window: 10 days of observed history at the previous scan, 11 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-08-05 (score 66, +1)

- [security improvement] CVE-2026-69207 no longer affects this package
- [security improvement] Known CVEs: fail → partial

### 2026-08-04 (score 65, +3)

- [security regression] CVE-2026-69207 affects this package: medium
- [security regression] Known CVEs: partial → fail
- [functional improvement] Stability: unverified → 0.30

### 2026-08-03 (score 62, +23)

- [security regression] Provenance: unverified → fail
- [security improvement] Install scripts: unverified → pass
- [security improvement] Known CVEs: unverified → partial
- [functional improvement] License: unverified → pass
- [functional improvement] Dependency health: unverified → partial
- [functional improvement] Maintenance: unverified → pass
- [functional improvement] Schema quality: unverified → good
- [functional] Licence: MIT

### 2026-08-02 (score 39, +20)

- [security improvement] Malware scan: unverified → pass
- [security] Stability: Stability not yet verified: not enough scan history yet (needs a 30-day window).
- [functional improvement] MCP protocol: unverified → pass

### 2026-08-01 (score 19, −7)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-31 (score 26, −18)

- [security regression] Malware scan: pass → unverified

### 2026-07-30 (score 44, +20)

- [functional improvement] Tool coverage: unverified → 100
- [functional] First check of Schema quality: unverified
- [functional] First check of Schema quality: fail
- [functional] First check of Schema quality: fail
- [functional] First check of Tool coverage: 87

## MCP tools (8)

### `day_count_fraction` (~243 tokens)

Day-count fraction

Exact day-count fraction between two dates under a market convention. Dates are ISO YYYY-MM-DD. For ACT/ACT ICMA also pass frequency (coupons per year) and, for stub periods, the reference period boundaries. Deterministic; do not estimate this with a model.

Input parameters:

- `convention` (string, required): Day-count convention, e.g. ACT/ACT ISDA or 30/360.
- `end` (required)
- `endIsTermination` (boolean): 30E/360 ISDA only: true if the end date is the instrument's maturity date.
- `frequency` (integer): ACT/ACT ICMA only, required for it: coupon payments per year (1, 2, 3, 4, 6, or 12).
- `referenceEnd`
- `referenceStart` (string): ACT/ACT ICMA only: reference (notional coupon) period boundary, ISO YYYY-MM-DD. Supply referenceStart and referenceEnd together, or neither.
- `start` (string, required): ISO calendar date, YYYY-MM-DD (e.g. 2024-03-15). Zero-padded, no time or timezone.

### `accrued_interest` (~180 tokens)

Accrued interest

Exact simple accrued interest (notional * rate * day-count fraction) between two dates. Dates are ISO YYYY-MM-DD; rate is the annual rate as a decimal (0.05 = 5%). Deterministic.

Input parameters:

- `convention` (string, required): Day-count convention, e.g. ACT/ACT ISDA or 30/360.
- `end` (required)
- `endIsTermination` (boolean): 30E/360 ISDA only: true if the end date is the instrument's maturity date.
- `notional` (number, required): Face / principal amount.
- `rate` (number, required): Annual rate as a decimal, e.g. 0.05 for 5%.
- `start` (string, required): ISO calendar date, YYYY-MM-DD (e.g. 2024-03-15). Zero-padded, no time or timezone.

### `list_conventions` (~16 tokens)

List conventions

List the supported day-count conventions.

### `is_business_day` (~139 tokens)

Business-day check

Whether a date is a business day under a holiday calendar, with the reason when it is not (weekend or holiday). Calendars are rules in code (no stale data feed). Deterministic; do not let a model guess market holidays.

Input parameters:

- `calendar` (string, required): Holiday calendar: us-federal (US federal holidays), nyse (NYSE trading days), sifma-us (US bond market), target (euro settlement), uk (England and Wales bank holidays).
- `date` (string, required): ISO calendar date, YYYY-MM-DD (e.g. 2024-03-15). Zero-padded, no time or timezone.

### `adjust_date` (~163 tokens)

Adjust to a business day

Adjust a date to a business day under an ISDA convention and holiday calendar. Business days pass through unchanged. modified-following falls back to preceding rather than leave the month (the bond-market default). Deterministic.

Input parameters:

- `calendar` (string, required): Holiday calendar: us-federal (US federal holidays), nyse (NYSE trading days), sifma-us (US bond market), target (euro settlement), uk (England and Wales bank holidays).
- `convention` (string, required): ISDA business-day adjustment convention: following, modified-following, preceding, modified-preceding, or unadjusted.
- `date` (string, required): ISO calendar date, YYYY-MM-DD (e.g. 2024-03-15). Zero-padded, no time or timezone.

### `add_business_days` (~138 tokens)

Add business days

Move a signed number of business days under a holiday calendar (settlement math: T+2 is count 2). Zero returns the date unchanged. Deterministic.

Input parameters:

- `calendar` (string, required): Holiday calendar: us-federal (US federal holidays), nyse (NYSE trading days), sifma-us (US bond market), target (euro settlement), uk (England and Wales bank holidays).
- `count` (integer, required): Business days to move; negative moves backward.
- `date` (string, required): ISO calendar date, YYYY-MM-DD (e.g. 2024-03-15). Zero-padded, no time or timezone.

### `generate_schedule` (~282 tokens)

Generate a payment schedule

Generate coupon/payment accrual periods between an effective and a termination date: monthly to annual frequency, backward or forward roll, short or long stub, optional end-of-month rule, business-day adjustment per calendar. Returns each period's unadjusted and adjusted start and end. This is where hand-rolled date code goes wrong; do not approximate it.

Input parameters:

- `calendar` (string, required): Holiday calendar: us-federal (US federal holidays), nyse (NYSE trading days), sifma-us (US bond market), target (euro settlement), uk (England and Wales bank holidays).
- `convention` (string): Adjustment for every date except termination. Default modified-following.
- `effective` (string, required): ISO calendar date, YYYY-MM-DD (e.g. 2024-03-15). Zero-padded, no time or timezone.
- `endOfMonth` (boolean): When true and the anchor is a month-end, every roll date is a month-end.
- `frequency` (string, required): Coupon frequency: annual, semiannual, quarterly, or monthly.
- `generation` (string): Roll direction; backward (default) puts any stub in front.
- `stub` (string): Keep the short stub (default) or merge it into its neighbor.
- `termination` (required)
- `terminationConvention`: Adjustment for the termination date. Default: same as convention.

### `list_calendars` (~23 tokens)

List calendars

List the supported holiday calendars with a one-line description of each.

## Diagnostics

Captured diagnostic sections: Provenance, Dependencies. The full working is on the page: https://verifymcp.io/servers/jayofemi-shikamaru/jayofemi-shikamaru#diagnostics

## Score history

- 2026-08-06: 67
- 2026-08-05: 66
- 2026-08-04: 65
- 2026-08-03: 62
- 2026-08-02: 39
- 2026-08-01: 19
- 2026-07-31: 26
- 2026-07-30: 44
- 2026-07-28: 24
- 2026-07-27: 24

## Links

- npm package: https://www.npmjs.com/package/@jayofemi/shikamaru
- Socket report: https://socket.dev/npm/package/@jayofemi/shikamaru
- Repository: https://github.com/JayOfemi/shikamaru
- Changelog RSS feed: https://verifymcp.io/servers/jayofemi-shikamaru/jayofemi-shikamaru.xml
- Changelog JSON feed: https://verifymcp.io/servers/jayofemi-shikamaru/jayofemi-shikamaru.json
- HTML version of this page: https://verifymcp.io/servers/jayofemi-shikamaru/jayofemi-shikamaru