duyanta123/dsh-data-insight

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A DSH (DeepSeek Harness) data-insight skill plugin: turns raw data into a structured Markdown analysis report of "business conclusions + metrics + charts".

A pure instruction-type skill plugin with zero dependencies and zero build. Computation is done by the LLM driven by the host's file/shell tools; the package ships a zero-dependency CSV profiling script and full chart/report specifications.

Positioning

dsh-data-insight covers the "data → report" step: given a data source, it produces a reviewable Markdown report. It does not write or clean data back to storage, and it never sends data to any external service.

It answers:

• What does this data look like overall (schema / missing / duplicates / distribution)?
• What are the core metrics, and how do they change period over period?
• What are the TopN entries and outliers (Z-score / IQR)?
• What numbers back each conclusion, and can they be recomputed?

Rigor guarantees (hard gates baked into the report template): every conclusion backed by numbers, facts separated from inference, reproducible metrics definitions, no fabricated data.

Installation

As a DSH plugin (recommended):

dsh plugin --profile web add "github:duyanta123/dsh-data-insight#v0.1.5"

Or from npm:

npm install dsh-data-insight

Or manually in two steps (in the target profile directory): add "dsh-data-insight": "^0.1.5" to dependencies in package.json, and add "dsh-data-insight" to the dsh.profile.bundles array.

Compatibility tiers: the standalone CSV / DuckDB scripts run on Node.js >= 18; as a DSH 0.1.5-rc.2 plugin it is verified with Node.js >= 22.19. Run npm run test:compat to execute an isolated-profile add, dump-config, and startup smoke test.

After restarting the profile, the data-insight-runbook skill appears in the skill list and is ready to use.

Quick Start

1. Use as a DSH skill

Say "analyze this CSV and give me a report", "take a look at this data", or "compute these metrics for me" with a data source attached (file path / pasted table / DuckDB connection). The model loads data-insight-runbook and runs the five-stage pipeline: input intake → data profiling → metric computation → chart rendering → report output (hard gates at each stage). The deliverable is a Markdown report written to the workspace.

2. Use as a standalone profiling script

node skills/data-insight-runbook/scripts/csv-profile.mjs skills/data-insight-runbook/examples/sample-sales.csv

Prints a profiling report for the CSV (schema / missing / distribution / outliers); the corresponding full report sample is examples/sample-report.md.

3. DuckDB direct connection (optional)

Zero dependencies by default; to query databases directly, install the DuckDB single-file CLI (on PATH). Install scripts: Windows skills/data-insight-runbook/scripts/setup-duckdb.ps1, macOS/Linux skills/data-insight-runbook/scripts/setup-duckdb.sh.

# Query CSV/Parquet directly: no database file, no -readonly (v1.5.5: -readonly fails on in-memory databases)
duckdb -csv -c "SELECT * FROM read_csv_auto('data.csv') LIMIT 100"
# Database file / remote DB: connection string via env var, forced read-only (POSIX shell: "$DATA_INSIGHT_DB_URL")
duckdb -readonly -csv -c "SELECT ... LIMIT 5000" "$env:DATA_INSIGHT_DB_URL"

CLI Options

Option	Default	Description
<file>	-	Path to the CSV file to profile
--sep <char>	auto-detect	Field separator (auto-detects ,, \t, ;)
--encoding <enc>	utf8	File encoding: utf8 / utf16le / latin1 (transcode GBK files first)
--limit <N>	0 (all)	Limit rows read, for sampling very large datasets
--json	-	Output the profiling result as JSON

Output

The final artifact of the five-stage pipeline is a Markdown analysis report with a fixed skeleton defined in docs/report-template.md:

• Core conclusions (each backed by numbers with cross-references)
• Data overview (schema, missing values, duplicates, dispositions)
• Metric details (summary stats, period-over-period, TopN, outliers)
• Trends & comparisons (three-channel charts: Markdown tables + numbers first, Mermaid / ASCII bar charts as fallback)
• Definitions & recomputation (facts separated from inference)

Safety Boundaries

• Read-only profiling: the CSV profiling script only reads its input file — no writes, no network.
• DuckDB red lines: database connections always use -readonly (write statements are blocked); connection strings go through the DATA_INSIGHT_DB_URL env var, never into commands, config, or reports; queries default to LIMIT 5000.
• No fabricated data: report conclusions must be backed by numbers; missing data is stated as-is.

Troubleshooting

DuckDB says Cannot launch in-memory database in read-only mode? Don't pass -readonly for file-less queries (CSV/Parquet) — see the example above; -readonly is only for database files / remote databases.

duckdb: command not found? The CLI isn't installed or isn't on PATH; run the platform install script (skills/data-insight-runbook/scripts/setup-duckdb.ps1 / setup-duckdb.sh) and reopen the terminal.

Garbled Chinese text in CSV? Prefer UTF-8 (BOM is handled correctly); transcode GBK files first with iconv -f GBK -t UTF-8.

Metrics don't match expectations? Run node skills/data-insight-runbook/scripts/csv-profile.mjs <file> first and check the profiling report's missing values / duplicate rows / outlier distribution — real-world sample data has surfaced three classes of issues (a single dirty row driving a spike, duplicates inflating counts, missing values dragging averages), all exposed at the profiling stage.

Mermaid charts don't render in local Markdown preview? Over file://, CDN-loaded mermaid.js is blocked by same-origin policy; open with a local renderer such as Typora, or switch to the Markdown table / ASCII bar chart channels per docs/chart-spec.md.

Old sessions won't open after upgrading the DSH host to 0.1.5.x? The Session format V3 migration is irreversible and is host behavior; back up session logs before upgrading the host (see the 0.1.4 entry in CHANGELOG.md).

Documentation

• docs/chart-spec.md — three-channel chart spec and examples (including the warning that the DSH Web GUI doesn't render Mermaid)
• docs/report-template.md — report skeleton + rigor checklist
• examples/ — sample CSV and full sample report
• CHANGELOG.md — release notes
• PLUGIN-MAINTENANCE.md — repo maintenance runbook

License

MIT