A reference for editing PDD files, a proprietary XML format used by MicroOLAP Database Designer for PostgreSQL. It documents the file hierarchy and rules needed for tables, indexes, constraints, and relationships.

Inspecting or editing legacy PDD database diagrams, adding schema objects, and preserving compatibility with MicroOLAP Database Designer.

PDD files have undocumented details that can make a manually edited file fail in the design tool. The guide highlights identifiers, XML structure, escaping, and index settings that are easy to get wrong.

pgmdd — Skill for Claude Code by vmkteam/claude-plugins

Install

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.

Any agent

npx skills add vmkteam/claude-plugins --skill pgmdd

Clone the repo

git clone --depth 1 https://github.com/vmkteam/claude-plugins

Made for: Claude Code.

Or install vmkteam-developer, the plugin that ships this one along with the rest of its 35 skills.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/vmkteam/claude-plugins/pgmdd/github.svg)](https://agentmods.dev/skills/vmkteam/claude-plugins/pgmdd)

Your own site

<a href="https://agentmods.dev/skills/vmkteam/claude-plugins/pgmdd"><img src="https://agentmods.dev/badge/skills/vmkteam/claude-plugins/pgmdd/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/vmkteam/claude-plugins/pgmdd"><img src="https://agentmods.dev/badge/skills/vmkteam/claude-plugins/pgmdd.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 30 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 930 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

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	$0.00030	$0.00930
Opus 5.5	$0.00012	$0.00372
Sonnet 5.5	$0.00006	$0.00186
Haiku 4.5	$0.00003	$0.00093

Measured 23d ago against content hash b0b85a9aa943, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

pgmdd 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 23d 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.

plugins/developer/skills/pgmdd/SKILL.md · 83 lines

How it starts

The opening of the file, as written. The whole thing — 83 lines — stays where its author put it; the contents beside it link to each section on GitHub.

PDD — MicroOLAP Database Designer формат

.pdd — проприетарный XML MicroOLAP Database Designer for PostgreSQL. Публичной спецификации нет — ориентируйся на существующие файлы в docs/.

Для новых проектов предпочитай PGD (см. /pgd). PDD — legacy-формат.

Non-obvious правила

Числовые ID уникальны в пределах файла — при добавлении объекта сначала найди max(ID)
После ручной правки файл нужно открыть и пересохранить в MDD GUI, иначе Generate Script сломается — напомни об этом пользователю
COMPOSITE на каждую таблицу — запись-тип с MasterTableOID = ID ENTITY; без неё таблица не видна в GUI
INDEXCOLUMNS — имена, не ID колонок (через COMMATEXT)
" в Predicate экранируется как \A, ' — как \a
GIN = Method="5", GIST = Method="4" (легко перепутать)
DEFAULT пустая строка: DefaultValue="''" QuoteDefault="0" (выражение, не литерал)

Иерархия

DBMODEL
├── MODELSETTINGS, DATABASE, ROLES, SCHEMAS
├── COMPOSITES              запись-тип на каждую таблицу
└── METADATA
    ├── ENTITIES            таблицы
    │   ├── COLUMNS
    │   ├── CONSTRAINTS     PK (Kind=2), UNIQUE (Kind=1)
    │   └── INDEXES         внутри ENTITY (в отличие от PGD!)
    └── REFERENCES          FK отдельной секцией

Типы (Datatype коды)

PG	Datatype	Type	Width
text	25	text	0
varchar(N)	1043	varchar	N
int4	23	int4	0
int8	20	int8	0
float4	700	float4	0
float8	701	float8	0
bool	16	bool	0
jsonb	3802	jsonb	0
timestamptz	1184	timestamp with time zone	-1
text[]	1009	text[]	0
int4[]	1007	int4[]	0

COLUMN

<COLUMN ID="1428002" Name="filename" Pos="2"
    Datatype="25" Type="text" Width="0" Prec="0"
    NotNull="1" AutoInc="0" PrimaryKey="0" IsFKey="0"
    DefaultValue="" QuoteDefault="0" Comments=""/>

NotNull/PrimaryKey/IsFKey — 0/1
AutoInc — 0=нет, 2=ALWAYS IDENTITY, 3=BY DEFAULT IDENTITY
QuoteDefault — 0=выражение (NOW(), 0, ''), 1=строковый литерал ({}, текст)

Read the full file on GitHub · 83 lines

Changes

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.

23d ago Changed · +1 lines b0b85a9aa943
1mo ago First seen · 82 lines · 30 tokens per session scan A 40614fc9fe9b

Subscribe to this mod's changes

pgmdd is a skill published in the GitHub repository vmkteam/claude-plugins (7 stars, last pushed 6d ago), licensed MIT. It adds 30 tokens to every session and 930 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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