LangAlpha is an agent workspace for researching financial markets and supporting investment decisions through persistent research, news analysis, and parallel subagents. It is for investors who want to develop and update trading theses over time, including generating long-short pair-trade ideas. The catalogue entries provide the skills, instructions, MCP servers, and plugin that make up its agent workflow.
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 ginlix-ai/LangAlpha --skill pptxgit clone --depth 1 https://github.com/ginlix-ai/LangAlphaWrote 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/ginlix-ai/langalpha/pptx)<a href="https://agentmods.dev/skills/ginlix-ai/langalpha/pptx"><img src="https://agentmods.dev/badge/skills/ginlix-ai/langalpha/pptx/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/ginlix-ai/langalpha/pptx"><img src="https://agentmods.dev/badge/skills/ginlix-ai/langalpha/pptx.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 | $0.00043 | $0.07774 |
| Opus 5.5 | $0.00017 | $0.03110 |
| Sonnet 5.5 | $0.00009 | $0.01555 |
| Haiku 4.5 | $0.00004 | $0.00777 |
Grade A, and why
pptx 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 28d 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.
This is a copy
83% identical to pptx — 409 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 323 lines — stays where its author put it; the contents beside it link to each section on GitHub.
PPTX
Build or edit a PowerPoint deck and write it into the task directory (e.g. acme_q4/acme_q4_review.pptx). Someone will stand in front of it, or forward it to a colleague who will. That is what the format is for: a deck is a sequence of single claims, each sized to be read from the back of a room. A slide that needs a paragraph is not a slide, it is a page, and it belongs in a report.
This is the right output when the deck itself is the deliverable: an investment committee pack, a diligence readout, a board update, an earnings walkthrough. It is the wrong output for anything the reader will study alone at their own pace (that is html-report) and for anything they will change numbers in (that is xlsx).
User preferences override these defaults. A house template, a brand palette, a required title slide, a fixed section order: those outrank every rule here. If the user hands you a deck to work in, work in it and match what is already there. The rules below are for when nothing has been specified.
Decide: Which Output?
| Want | Use |
|---|---|
| Something to present from, or hand to someone who will present it and edit slide by slide | pptx (this skill) |
| A document to read alone, print, or export to PDF | html-report |
| A model they will change inputs in | xlsx |
| One chart or table inside the conversation | inline-widget |
| A live app with a backend | interactive-dashboard |
Workflow
- Outline first, one message per slide. Write the outline before any code, as
## Slide Nheadings each carrying one declarative sentence: the claim the slide makes, not its topic. "Revenue grew 21 percent on flat headcount" is a slide. "Revenue" is a filing cabinet. If you cannot write the sentence, you do not have the slide yet. - Write a build script,
<task>/build_<name>.js, and run it withNODE_PATH=$(npm root -g) node <task>/build_<name>.js. Never assemble a deck through ad-hoc calls. The script is the source of truth; when the user asks for a change, edit the script and rerun. - Audit the file, not the script.
python .agents/skills/pptx/scripts/check.py <task>/<name>.pptx --strictreads what the file contains, including the position a placeholder inherits from its layout, and reports shapes off the slide, boxes covering each other, overflowing text, fonts and placeholders. It compares the slide's own shapes, so branding that lives on the layout or the master is something only the render in step 4 will show you covered. Fix everyfail; for everywarn, either fix it or write the one line in the delivery that says why it stands. - Render and look:
python .agents/skills/pptx/scripts/render.py <task>/<name>.pptx --montage, then viewmontage.png. This is not optional. Clipped text, a legend over a bar, a title that jumps, one slide twice as dense as its neighbours: all of it is visible here and nowhere else. - Fix in the build script, never in the .pptx, then rerun steps 2 to 4 until
check.pypasses and the render looks right. - Deliver the
.pptxand the.jsbeside it, and say in the reply what each slide claims.
What ships with it
3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 28d ago Changed 2b524ccc6f65
- 1mo ago Changed · +90 lines · -109 tokens per session 057b31caafac
- 1mo ago First seen · 233 lines · 152 tokens per session scan A e5b0df918cbe
pptx is a skill published in the GitHub repository ginlix-ai/LangAlpha (1,826 stars, last pushed today), licensed Apache-2.0. It adds 43 tokens to every session and 7,774 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 83% identical to pptx, differing in 409 lines, and is treated as a copy.
Other skills, from other repositories
Comprehensive PDF manipulation toolkit for extracting text and tables, creating new PDFs, merging/splitting documents, and handling forms. When Claude needs to fill in a PDF form or programmatically process, generate, or analyze PDF documents at scale.
xlsx
Comprehensive spreadsheet creation, editing, and analysis with support for formulas, formatting, data analysis, and visualization. When Claude needs to work with spreadsheets (.xlsx, .xlsm, .csv, .tsv, etc) for: (1) Creating new spreadsheets with formulas and formatting, (2) Reading or analyzing data, (3) Modify…
pptx
Presentation creation, editing, and analysis. When Claude needs to work with presentations (.pptx files) for: (1) Creating new presentations, (2) Modifying or editing content, (3) Working with layouts, (4) Adding comments or speaker notes, or any other presentation tasks.
docx
Comprehensive document creation, editing, and analysis with support for tracked changes, comments, formatting preservation, and text extraction. When Claude needs to work with professional documents (.docx files) for: (1) Creating new documents, (2) Modifying or editing content, (3) Working with tracked changes, (4)…
report-generator
Generate professional HTML/PDF investment reports with interactive visualizations.
creating-financial-models
This skill provides an advanced financial modeling suite with DCF analysis, sensitivity testing, Monte Carlo simulations, and scenario planning for investment decisions.