# Rakenne 0.5.0 — Template Engine, Variable Extraction, and DOCX Tools > 0.5.0 introduces a schema-driven template engine for rendering structured documents, a traceability-rich extraction pipeline for pulling variables from source documents, and a full suite of tools for creating and editing Word files. Author: map[name:Rakenne team] Published: 2026-03-05 URL: https://rakenne.app/learn/releases/rakenne-0-5-0/index.md We're pleased to announce **Rakenne 0.5.0**. This release adds three major capabilities: a **template engine** for rendering structured documents from validated variables, an **extraction pipeline** for pulling variable data out of source documents with full traceability, and a **DOCX tools** skill for creating, editing, and converting Word files. ## Template engine Skills can now define a **variable schema** and **document templates** for their output. The agent uses four new tools to validate, lint, render, and audit the result: - **Validate variables** — Checks variable values against the schema. Supports rich types (currency, dates, CNPJ, CPF, percentages, formatted tables) and reports fill rate so you know how complete the data is before rendering. - **Lint template** — Catches errors before rendering: missing helpers, undefined variables, optional values without fallback text. Reports issues with file and line references so the agent can fix them in place. - **Render template** — Substitutes validated variables into the template with locale-aware formatting (e.g. `R$ 1.500.000,00` for Brazilian Portuguese, `$1,500,000.00` for English). Derived variables are computed automatically from their sources. - **Audit render** — Compares the rendered output against the original template. Validates that **immutable zones** (regulatory disclaimers, boilerplate clauses) are unchanged, runs anti-contamination checks, and enforces change budgets so the agent stays within expected bounds. Templates support partials, conditional sections, and over 40 locale-aware formatting helpers. The engine is deterministic — same inputs always produce the same output. ## Variable extraction A new eight-tool pipeline lets the agent extract structured variables from source documents (PDF, DOCX, or other formats) and produce a `variables.json` file ready for the template engine: - **Ingest** — Converts the source document into a line-addressable page corpus (one text file per page) so every extracted value can be traced back to its exact location. - **Segment** — Detects section boundaries using a taxonomy definition, splitting the corpus into manageable pieces the agent reads one at a time. - **Record** — As the agent reads each section, it records extracted values. The tool normalizes them automatically — currencies, dates, and identifiers are converted to their standard storage format — and tags each value with its page and line span. - **Consolidate** — Merges all section extractions into a single `variables.json`. When the same variable appears in multiple sections, conflict resolution picks the best candidate based on validity, specificity, and section priority. - **Double-check** — Scans the corpus for any variables still null after consolidation, using format-aware patterns to surface candidates the agent may have missed. Every value in the final output carries full provenance: which page, which lines, which section, and how conflicts were resolved. The result plugs directly into the template engine's `validate_variables` tool for a seamless extract-then-render workflow. ## DOCX tools A new **docx-tools** skill gives the agent nine tools for working with Word documents: - **Build** — Create `.docx` files programmatically with full control over paragraphs, tables, headers, footers, lists, and styles. - **Unpack / Pack** — Extract a `.docx` into editable XML files (with automatic pretty-printing) and re-zip them into a valid `.docx`. Useful for precise formatting changes that go beyond what the high-level build tool offers. - **Extract text** — Pull document content as plain text, with control over tracked changes: show all markup, accept final, or reject to original. - **Accept changes** — Accept all tracked changes, producing a clean document without revision marks. - **Add comment** — Anchor review comments to specific text, with support for threaded replies. - **Validate** — Check document structure for missing files, malformed content, duplicate IDs, and broken relationships, with optional auto-repair. - **Convert** — Convert between `.doc`, `.docx`, PDF, HTML, and ODT. The skill installs from the library like any other and ships with reference guides so the agent can build complex documents without external help. --- Thank you for using Rakenne. These three features work together as a pipeline — extract variables from a source document, render them into a template, and export the result as a polished Word file. We'd love to hear how you put them to use. — The Rakenne team --- Back to [Releases](https://rakenne.app/learn/releases/index.md)