diff --git a/README.md b/README.md
index 2cccc6b..12cd6eb 100644
--- a/README.md
+++ b/README.md
@@ -46,7 +46,7 @@ organization and Actions axes:
   (who is an owner, the all-members team, ruleset tuning) is an input, not a baked-in
   constant.
 
-See [`docs/PLAN.md`](docs/PLAN.md) for the design rationale, a comparison with the
+See [`docs/DESIGN.md`](docs/DESIGN.md) for the design rationale, a comparison with the
 existing ecosystem modules, and the feature roadmap.
 
 ## Architecture
@@ -106,14 +106,14 @@ root).
 | Name | Description | Type | Default | Required |
 | ---- | ----------- | ---- | ------- | :------: |
 | <a name="input_all_members_team_name"></a> [all\_members\_team\_name](#input\_all\_members\_team\_name) | Name of the all-members team. | `string` | `"everyone"` | no |
-| <a name="input_baseline_ruleset"></a> [baseline\_ruleset](#input\_baseline\_ruleset) | Baseline org-wide branch-protection ruleset. See the organization submodule for the object schema; set enabled = false to disable. | <pre>object({<br/>    enabled                           = optional(bool, true)<br/>    block_deletion                    = optional(bool, true)<br/>    block_force_pushes                = optional(bool, false)<br/>    required_approving_review_count   = optional(number, 1)<br/>    require_code_owner_review         = optional(bool, true)<br/>    require_last_push_approval        = optional(bool, false)<br/>    dismiss_stale_reviews_on_push     = optional(bool, false)<br/>    required_review_thread_resolution = optional(bool, true)<br/>  })</pre> | `{}` | no |
 | <a name="input_create_all_members_team"></a> [create\_all\_members\_team](#input\_create\_all\_members\_team) | Create an all-members team that grants default read access to non-restricted repositories. | `bool` | `true` | no |
+| <a name="input_enabled_presets"></a> [enabled\_presets](#input\_enabled\_presets) | Names of built-in ruleset presets to enable. See modules/organization/main.tf local.presets. | `list(string)` | <pre>[<br/>  "require_pull_request_reviews",<br/>  "restrict_deletions",<br/>  "require_signed_commits"<br/>]</pre> | no |
+| <a name="input_organization_rulesets"></a> [organization\_rulesets](#input\_organization\_rulesets) | Organization rulesets, keyed by name. Merged with (and overridden by name by)<br/>the presets selected via enabled\_presets. bypass\_actors uses raw numeric<br/>actor\_id (OrganizationAdmin needs none); team-name bypass is per-repo only. | <pre>map(object({<br/>    enforcement          = optional(string, "active")<br/>    target               = optional(string, "branch")<br/>    include_refs         = optional(list(string), ["~ALL"])<br/>    exclude_refs         = optional(list(string), [])<br/>    include_repositories = optional(list(string), ["~ALL"])<br/>    exclude_repositories = optional(list(string), [])<br/>    bypass_actors = optional(list(object({<br/>      actor_type  = string<br/>      actor_id    = optional(number, 0)<br/>      bypass_mode = optional(string, "always")<br/>    })), [])<br/>    rules = object({<br/>      creation                = optional(bool, false)<br/>      update                  = optional(bool, false)<br/>      deletion                = optional(bool, false)<br/>      non_fast_forward        = optional(bool, false)<br/>      required_signatures     = optional(bool, false)<br/>      required_linear_history = optional(bool, false)<br/>      pull_request = optional(object({<br/>        required_approving_review_count   = optional(number, 0)<br/>        require_code_owner_review         = optional(bool, false)<br/>        require_last_push_approval        = optional(bool, false)<br/>        dismiss_stale_reviews_on_push     = optional(bool, false)<br/>        required_review_thread_resolution = optional(bool, false)<br/>      }))<br/>    })<br/>  }))</pre> | `{}` | no |
 | <a name="input_organization_secrets"></a> [organization\_secrets](#input\_organization\_secrets) | Visibility config for org-level shared secrets. Values come from var.secrets.org. | <pre>map(object({<br/>    visibility   = optional(string, "private")<br/>    repositories = optional(list(string), [])<br/>  }))</pre> | `{}` | no |
 | <a name="input_organization_variables"></a> [organization\_variables](#input\_organization\_variables) | Org-level shared Actions variables (plaintext value + visibility). | <pre>map(object({<br/>    value        = string<br/>    visibility   = optional(string, "private")<br/>    repositories = optional(list(string), [])<br/>  }))</pre> | `{}` | no |
 | <a name="input_owners"></a> [owners](#input\_owners) | Explicit set of owner usernames (mapped to GitHub's `admin` role). Ignored when `owners_team` is set. | `set(string)` | `[]` | no |
 | <a name="input_owners_team"></a> [owners\_team](#input\_owners\_team) | Convenience: derive organization owners from the members of this team, by<br/>name. `null` (default) means use the explicit `owners` set instead. There is<br/>no hardcoded owners team — the consumer chooses. | `string` | `null` | no |
-| <a name="input_repositories"></a> [repositories](#input\_repositories) | Repositories and which teams may access them. See the repository submodule for the full object schema and validations. | <pre>list(object({<br/>    name        = string<br/>    description = string<br/>    visibility  = optional(string, "private")<br/>    readers     = optional(list(string), [])<br/>    writers     = optional(list(string), [])<br/>    admins      = optional(list(string), [])<br/>    restricted  = optional(bool, false)<br/><br/>    topics             = optional(list(string), [])<br/>    homepage_url       = optional(string, null)<br/>    has_issues         = optional(bool, true)<br/>    has_wiki           = optional(bool, false)<br/>    has_projects       = optional(bool, false)<br/>    has_downloads      = optional(bool, true)<br/>    is_template        = optional(bool, false)<br/>    gitignore_template = optional(string, null)<br/>    license_template   = optional(string, null)<br/>    archived           = optional(bool, false)<br/>    archive_on_destroy = optional(bool, false)<br/>    default_branch     = optional(string, null)<br/>    enable_pages       = optional(bool, false)<br/>    signed_commits     = optional(bool, true)<br/><br/>    allow_merge_commit     = optional(bool, true)<br/>    allow_squash_merge     = optional(bool, false)<br/>    allow_rebase_merge     = optional(bool, false)<br/>    allow_auto_merge       = optional(bool, true)<br/>    delete_branch_on_merge = optional(bool, true)<br/>    merge_commit_message   = optional(string, "PR_BODY")<br/>    merge_commit_title     = optional(string, "PR_TITLE")<br/><br/>    template = optional(object({<br/>      owner                = string<br/>      repository           = string<br/>      include_all_branches = optional(bool, false)<br/>    }))<br/><br/>    variables = optional(map(string), {})<br/>    environments = optional(map(object({<br/>      variables  = optional(map(string), {})<br/>      reviewers  = optional(list(string), [])<br/>      wait_timer = optional(number, 0)<br/>      deployment_branch_policy = optional(object({<br/>        protected_branches     = optional(bool, false)<br/>        custom_branch_policies = optional(list(string), [])<br/>      }))<br/>    })), {})<br/>  }))</pre> | `[]` | no |
-| <a name="input_require_signed_commits"></a> [require\_signed\_commits](#input\_require\_signed\_commits) | Require signed commits on all branches of all repositories (except repositories with signed\_commits = false). | `bool` | `true` | no |
+| <a name="input_repositories"></a> [repositories](#input\_repositories) | Repositories and which teams may access them. See the repository submodule for the full object schema and validations. | <pre>list(object({<br/>    name        = string<br/>    description = string<br/>    visibility  = optional(string, "private")<br/>    readers     = optional(list(string), [])<br/>    writers     = optional(list(string), [])<br/>    admins      = optional(list(string), [])<br/>    restricted  = optional(bool, false)<br/><br/>    topics             = optional(list(string), [])<br/>    homepage_url       = optional(string, null)<br/>    has_issues         = optional(bool, true)<br/>    has_wiki           = optional(bool, false)<br/>    has_projects       = optional(bool, false)<br/>    has_downloads      = optional(bool, true)<br/>    is_template        = optional(bool, false)<br/>    gitignore_template = optional(string, null)<br/>    license_template   = optional(string, null)<br/>    archived           = optional(bool, false)<br/>    archive_on_destroy = optional(bool, false)<br/>    default_branch     = optional(string, null)<br/>    enable_pages       = optional(bool, false)<br/>    signed_commits     = optional(bool, true)<br/><br/>    allow_merge_commit     = optional(bool, true)<br/>    allow_squash_merge     = optional(bool, false)<br/>    allow_rebase_merge     = optional(bool, false)<br/>    allow_auto_merge       = optional(bool, true)<br/>    delete_branch_on_merge = optional(bool, true)<br/>    merge_commit_message   = optional(string, "PR_BODY")<br/>    merge_commit_title     = optional(string, "PR_TITLE")<br/><br/>    template = optional(object({<br/>      owner                = string<br/>      repository           = string<br/>      include_all_branches = optional(bool, false)<br/>    }))<br/><br/>    rulesets = optional(map(object({<br/>      enforcement  = optional(string, "active")<br/>      target       = optional(string, "branch")<br/>      include_refs = optional(list(string), ["~ALL"])<br/>      exclude_refs = optional(list(string), [])<br/>      bypass_actors = optional(list(object({<br/>        actor_type  = string<br/>        actor_id    = optional(number, 0)<br/>        team        = optional(string)<br/>        bypass_mode = optional(string, "always")<br/>      })), [])<br/>      rules = object({<br/>        creation                = optional(bool, false)<br/>        update                  = optional(bool, false)<br/>        deletion                = optional(bool, false)<br/>        non_fast_forward        = optional(bool, false)<br/>        required_signatures     = optional(bool, false)<br/>        required_linear_history = optional(bool, false)<br/>        pull_request = optional(object({<br/>          required_approving_review_count   = optional(number, 0)<br/>          require_code_owner_review         = optional(bool, false)<br/>          require_last_push_approval        = optional(bool, false)<br/>          dismiss_stale_reviews_on_push     = optional(bool, false)<br/>          required_review_thread_resolution = optional(bool, false)<br/>        }))<br/>      })<br/>    })), {})<br/><br/>    variables = optional(map(string), {})<br/>    environments = optional(map(object({<br/>      variables  = optional(map(string), {})<br/>      reviewers  = optional(list(string), [])<br/>      wait_timer = optional(number, 0)<br/>      deployment_branch_policy = optional(object({<br/>        protected_branches     = optional(bool, false)<br/>        custom_branch_policies = optional(list(string), [])<br/>      }))<br/>    })), {})<br/>  }))</pre> | `[]` | no |
 | <a name="input_secrets"></a> [secrets](#input\_secrets) | Decrypted secret values keyed by scope. Supplied already-decrypted by the caller; this module never performs decryption. | <pre>object({<br/>    org = optional(map(string), {})<br/>    repos = optional(map(object({<br/>      actions      = optional(map(string), {})<br/>      environments = optional(map(map(string)), {})<br/>    })), {})<br/>  })</pre> | <pre>{<br/>  "org": {},<br/>  "repos": {}<br/>}</pre> | no |
 | <a name="input_teams"></a> [teams](#input\_teams) | Teams and their membership. A team may hold predefined organization-level<br/>GitHub roles via `org_roles`. Repository access is granted per repository via<br/>readers/writers/admins, not through org roles. | <pre>list(object({<br/>    name        = string<br/>    description = string<br/>    members     = optional(list(string), [])<br/>    org_roles   = optional(list(string), [])<br/>  }))</pre> | `[]` | no |
 | <a name="input_users"></a> [users](#input\_users) | Organization members. `fullname`/`email` are informational; membership is keyed on `username`. | <pre>list(object({<br/>    username = string<br/>    fullname = optional(string, "")<br/>    email    = optional(string, "")<br/>  }))</pre> | `[]` | no |
diff --git a/docs/DESIGN.md b/docs/DESIGN.md
index 91962be..e2a3bbc 100644
--- a/docs/DESIGN.md
+++ b/docs/DESIGN.md
@@ -29,7 +29,7 @@ maintained suite that additionally covers ground none of them do:
 | Actions variables (repo + org) | ✅ |
 | Actions secrets (repo + org + environment) | ✅ |
 | Environments (reviewers, wait timers, branch policies) | ✅ |
-| Organization rulesets (baseline + signed commits) | ✅ |
+| Organization + per-repo rulesets (generic, preset-driven) | ✅ |
 | Organization roles assigned to teams | ✅ |
 
 ## Architecture
@@ -41,15 +41,17 @@ modules/organization  →  modules/teams  →  modules/repository
 ```
 
 - **`organization`** — org membership (owners mapped to `admin`, everyone else
-  `member`) and org rulesets (baseline branch protection + signed commits). Outputs
-  the membership map.
+  `member`) and generic organization rulesets: a `organization_rulesets` map
+  merged with curated, opt-in `enabled_presets` (PR reviews, deletion/force-push
+  protection, signed commits, linear history). Outputs the membership map.
 - **`teams`** — teams, team memberships, the optional all-members team, and org-role
   assignments (resolved by name against the org's predefined roles). Consumes the
   membership map + owner set; outputs a `name → {id, slug}` team map and the
   all-members team id.
 - **`repository`** — repositories, team↔repo grants, the default all-members read
-  grant, repository/environment Actions variables & secrets, and environments.
-  Consumes the team map; outputs a repository-id map.
+  grant, per-repo `rulesets` (same generic shape as the org rulesets, plus a
+  team-name bypass convenience), repository/environment Actions variables &
+  secrets, and environments. Consumes the team map; outputs a repository-id map.
 
 The **root** additionally manages organization-level Actions secrets and variables.
 These need both decrypted secret values and repository ids to resolve `selected`
@@ -64,7 +66,9 @@ repository module (which would create a dependency cycle).
      convenience that derives owners from a named team. No owners team is assumed.
    - The **all-members team** is controlled by `create_all_members_team` /
      `all_members_team_name`.
-   - The **baseline ruleset** is a tunable object (and can be disabled).
+   - **Rulesets** are a generic `organization_rulesets` / per-repo `rulesets` map
+     input; curated presets are opt-in via `enabled_presets` rather than hardcoded
+     defaults baked into a single "baseline" object.
    - **Org roles** validate at plan time against the roles GitHub actually exposes,
      not a static allowlist.
 2. **Secrets are never decrypted here.** The caller passes already-decrypted values
@@ -76,7 +80,9 @@ repository module (which would create a dependency cycle).
 **Tier 1 — per-repo depth (`modules/repository`)**
 
 - Issue labels (`github_issue_label`), optional merge-with-github-defaults
-- Per-repo `github_repository_ruleset` (composes with the org baseline ruleset)
+- ~~Per-repo `github_repository_ruleset`~~ — done: `repositories[].rulesets` is a
+  generic map (same `rules`/`bypass_actors` shape as `organization_rulesets`,
+  plus a `team` bypass convenience), composing alongside org-level presets.
 - Expose currently-fixed repo settings: `topics`, `homepage_url`, merge-strategy
   toggles, `has_wiki`/`has_downloads`, `is_template`, template source,
   `gitignore`/`license_template`, `archived`/`archive_on_destroy`, `default_branch`
diff --git a/examples/complete/main.tf b/examples/complete/main.tf
index cc79cb0..2430780 100644
--- a/examples/complete/main.tf
+++ b/examples/complete/main.tf
@@ -50,6 +50,13 @@ module "orgkit" {
       writers     = ["developers"]
       admins      = ["owners"]
       variables   = { NODE_ENV = "production" }
+      rulesets = {
+        "Protect main" = {
+          include_refs  = ["~DEFAULT_BRANCH"]
+          bypass_actors = [{ actor_type = "Team", team = "owners" }]
+          rules         = { required_linear_history = true }
+        }
+      }
       environments = {
         # protected_branches style: only protected branches may deploy.
         production = {
@@ -122,8 +129,15 @@ module "orgkit" {
     }
   }
 
-  # The baseline ruleset is tunable; here we require two approvals.
-  baseline_ruleset = {
-    required_approving_review_count = 2
+  # Enable a curated subset of built-in ruleset presets.
+  enabled_presets = ["require_pull_request_reviews", "restrict_deletions", "require_signed_commits", "block_force_pushes"]
+
+  # A custom org ruleset alongside the presets.
+  organization_rulesets = {
+    "No Tag Deletes" = {
+      target        = "tag"
+      bypass_actors = [{ actor_type = "OrganizationAdmin" }]
+      rules         = { deletion = true }
+    }
   }
 }
diff --git a/main.tf b/main.tf
index ec3acb0..6202d64 100644
--- a/main.tf
+++ b/main.tf
@@ -24,8 +24,8 @@ module "organization" {
 
   members                              = local.usernames
   owners                               = local.owners
-  baseline_ruleset                     = var.baseline_ruleset
-  require_signed_commits               = var.require_signed_commits
+  organization_rulesets                = var.organization_rulesets
+  enabled_presets                      = var.enabled_presets
   signed_commits_excluded_repositories = local.signed_commits_excluded
 }
 
diff --git a/modules/organization/README.md b/modules/organization/README.md
index c199076..fbd0769 100644
--- a/modules/organization/README.md
+++ b/modules/organization/README.md
@@ -30,17 +30,16 @@ No modules.
 | Name | Type |
 | ---- | ---- |
 | [github_membership.internal](https://registry.terraform.io/providers/integrations/github/latest/docs/resources/membership) | resource |
-| [github_organization_ruleset.baseline](https://registry.terraform.io/providers/integrations/github/latest/docs/resources/organization_ruleset) | resource |
-| [github_organization_ruleset.signed_commits](https://registry.terraform.io/providers/integrations/github/latest/docs/resources/organization_ruleset) | resource |
+| [github_organization_ruleset.internal](https://registry.terraform.io/providers/integrations/github/latest/docs/resources/organization_ruleset) | resource |
 
 ## Inputs
 
 | Name | Description | Type | Default | Required |
 | ---- | ----------- | ---- | ------- | :------: |
-| <a name="input_baseline_ruleset"></a> [baseline\_ruleset](#input\_baseline\_ruleset) | Baseline org-wide branch-protection ruleset applied to the default branch of<br/>every repository. Set `enabled = false` to disable it entirely. Defaults<br/>reproduce a require-review + code-owner-review + thread-resolution policy. | <pre>object({<br/>    enabled                           = optional(bool, true)<br/>    block_deletion                    = optional(bool, true)<br/>    block_force_pushes                = optional(bool, false)<br/>    required_approving_review_count   = optional(number, 1)<br/>    require_code_owner_review         = optional(bool, true)<br/>    require_last_push_approval        = optional(bool, false)<br/>    dismiss_stale_reviews_on_push     = optional(bool, false)<br/>    required_review_thread_resolution = optional(bool, true)<br/>  })</pre> | `{}` | no |
+| <a name="input_enabled_presets"></a> [enabled\_presets](#input\_enabled\_presets) | Names of built-in ruleset presets to enable. See modules/organization/main.tf local.presets. | `list(string)` | <pre>[<br/>  "require_pull_request_reviews",<br/>  "restrict_deletions",<br/>  "require_signed_commits"<br/>]</pre> | no |
 | <a name="input_members"></a> [members](#input\_members) | Set of GitHub usernames that are members of the organization. | `set(string)` | `[]` | no |
+| <a name="input_organization_rulesets"></a> [organization\_rulesets](#input\_organization\_rulesets) | Organization rulesets, keyed by name. Merged with (and overridden by name by)<br/>the presets selected via enabled\_presets. bypass\_actors uses raw numeric<br/>actor\_id (OrganizationAdmin needs none); team-name bypass is per-repo only. | <pre>map(object({<br/>    enforcement          = optional(string, "active")<br/>    target               = optional(string, "branch")<br/>    include_refs         = optional(list(string), ["~ALL"])<br/>    exclude_refs         = optional(list(string), [])<br/>    include_repositories = optional(list(string), ["~ALL"])<br/>    exclude_repositories = optional(list(string), [])<br/>    bypass_actors = optional(list(object({<br/>      actor_type  = string<br/>      actor_id    = optional(number, 0)<br/>      bypass_mode = optional(string, "always")<br/>    })), [])<br/>    rules = object({<br/>      creation                = optional(bool, false)<br/>      update                  = optional(bool, false)<br/>      deletion                = optional(bool, false)<br/>      non_fast_forward        = optional(bool, false)<br/>      required_signatures     = optional(bool, false)<br/>      required_linear_history = optional(bool, false)<br/>      pull_request = optional(object({<br/>        required_approving_review_count   = optional(number, 0)<br/>        require_code_owner_review         = optional(bool, false)<br/>        require_last_push_approval        = optional(bool, false)<br/>        dismiss_stale_reviews_on_push     = optional(bool, false)<br/>        required_review_thread_resolution = optional(bool, false)<br/>      }))<br/>    })<br/>  }))</pre> | `{}` | no |
 | <a name="input_owners"></a> [owners](#input\_owners) | Subset of `members` that are organization owners (mapped to GitHub's `admin`<br/>membership role); everyone else is a plain `member`. The consumer decides who<br/>is an owner — there is no hardcoded owners team. | `set(string)` | `[]` | no |
-| <a name="input_require_signed_commits"></a> [require\_signed\_commits](#input\_require\_signed\_commits) | Require signed commits on all branches of all repositories (except those excluded). | `bool` | `true` | no |
 | <a name="input_signed_commits_excluded_repositories"></a> [signed\_commits\_excluded\_repositories](#input\_signed\_commits\_excluded\_repositories) | Repository names excluded from the required-signed-commits ruleset. | `list(string)` | `[]` | no |
 
 ## Outputs
diff --git a/modules/organization/main.tf b/modules/organization/main.tf
index 535f9ef..d3bf78a 100644
--- a/modules/organization/main.tf
+++ b/modules/organization/main.tf
@@ -12,76 +12,114 @@ resource "github_membership" "internal" {
 }
 
 #
-# Baseline branch-protection ruleset: applied to the default branch of every
-# repository. Organization admins may bypass. Tunable via var.baseline_ruleset.
+# Generic organization rulesets: one for_each resource driven by the merged
+# preset + organization_rulesets map. Presets are curated, opt-in defaults
+# selected via var.enabled_presets; entries in var.organization_rulesets with
+# the same key override the preset of that name.
 #
 
-resource "github_organization_ruleset" "baseline" {
-  count = var.baseline_ruleset.enabled ? 1 : 0
-
-  name        = "Baseline"
-  enforcement = "active"
-  target      = "branch"
-
-  conditions {
-    ref_name {
-      exclude = []
-      include = ["~DEFAULT_BRANCH"]
+locals {
+  # Each preset is a full ruleset spec (same shape as var.organization_rulesets
+  # entries). rules objects specify every field so preset and user maps share a
+  # type when merged.
+  empty_rules = {
+    creation            = false, update = false, deletion = false, non_fast_forward = false,
+    required_signatures = false, required_linear_history = false, pull_request = null
+  }
+  admin_bypass = [{ actor_type = "OrganizationAdmin", actor_id = 0, bypass_mode = "always" }] # actor_id is coerced to 1 for OrganizationAdmin in the resource
+
+  presets = {
+    require_pull_request_reviews = {
+      enforcement          = "active", target = "branch"
+      include_refs         = ["~DEFAULT_BRANCH"], exclude_refs = []
+      include_repositories = ["~ALL"], exclude_repositories = []
+      bypass_actors        = local.admin_bypass
+      rules = merge(local.empty_rules, { pull_request = {
+        required_approving_review_count   = 1
+        require_code_owner_review         = true
+        require_last_push_approval        = false
+        dismiss_stale_reviews_on_push     = false
+        required_review_thread_resolution = true
+      } })
     }
-
-    repository_name {
-      exclude = []
-      include = ["~ALL"]
+    restrict_deletions = {
+      enforcement          = "active", target = "branch"
+      include_refs         = ["~DEFAULT_BRANCH"], exclude_refs = []
+      include_repositories = ["~ALL"], exclude_repositories = []
+      bypass_actors        = local.admin_bypass
+      rules                = merge(local.empty_rules, { deletion = true })
     }
-  }
-
-  bypass_actors {
-    actor_id    = 0
-    actor_type  = "OrganizationAdmin"
-    bypass_mode = "always"
-  }
-
-  rules {
-    deletion         = var.baseline_ruleset.block_deletion
-    non_fast_forward = var.baseline_ruleset.block_force_pushes
-
-    pull_request {
-      dismiss_stale_reviews_on_push     = var.baseline_ruleset.dismiss_stale_reviews_on_push
-      require_code_owner_review         = var.baseline_ruleset.require_code_owner_review
-      require_last_push_approval        = var.baseline_ruleset.require_last_push_approval
-      required_approving_review_count   = var.baseline_ruleset.required_approving_review_count
-      required_review_thread_resolution = var.baseline_ruleset.required_review_thread_resolution
+    require_signed_commits = {
+      enforcement          = "active", target = "branch"
+      include_refs         = ["~ALL"], exclude_refs = []
+      include_repositories = ["~ALL"], exclude_repositories = var.signed_commits_excluded_repositories
+      bypass_actors        = []
+      rules                = merge(local.empty_rules, { required_signatures = true })
+    }
+    block_force_pushes = {
+      enforcement          = "active", target = "branch"
+      include_refs         = ["~DEFAULT_BRANCH"], exclude_refs = []
+      include_repositories = ["~ALL"], exclude_repositories = []
+      bypass_actors        = local.admin_bypass
+      rules                = merge(local.empty_rules, { non_fast_forward = true })
+    }
+    require_linear_history = {
+      enforcement          = "active", target = "branch"
+      include_refs         = ["~DEFAULT_BRANCH"], exclude_refs = []
+      include_repositories = ["~ALL"], exclude_repositories = []
+      bypass_actors        = local.admin_bypass
+      rules                = merge(local.empty_rules, { required_linear_history = true })
     }
   }
-}
 
-#
-# Signed commits required on all branches of every repository by default. A
-# repository opts out by being listed in signed_commits_excluded_repositories.
-# Separate from Baseline so opting out does not weaken the other rules. No
-# bypass_actors deliberately: org admins are bound too.
-#
+  selected_presets = { for p in var.enabled_presets : p => local.presets[p] }
+  all_rulesets     = merge(local.selected_presets, var.organization_rulesets)
+}
 
-resource "github_organization_ruleset" "signed_commits" {
-  count = var.require_signed_commits ? 1 : 0
+resource "github_organization_ruleset" "internal" {
+  for_each = local.all_rulesets
 
-  name        = "Signed Commits"
-  enforcement = "active"
-  target      = "branch"
+  name        = each.key
+  enforcement = each.value.enforcement
+  target      = each.value.target
 
   conditions {
     ref_name {
-      exclude = []
-      include = ["~ALL"]
+      include = each.value.include_refs
+      exclude = each.value.exclude_refs
     }
-
     repository_name {
-      include = ["~ALL"]
-      exclude = var.signed_commits_excluded_repositories
+      include = each.value.include_repositories
+      exclude = each.value.exclude_repositories
+    }
+  }
+
+  dynamic "bypass_actors" {
+    for_each = each.value.bypass_actors
+    content {
+      actor_id    = bypass_actors.value.actor_type == "OrganizationAdmin" ? 1 : bypass_actors.value.actor_id
+      actor_type  = bypass_actors.value.actor_type
+      bypass_mode = bypass_actors.value.bypass_mode
     }
   }
 
   rules {
-    required_signatures = true
+    creation                = each.value.rules.creation
+    update                  = each.value.rules.update
+    deletion                = each.value.rules.deletion
+    non_fast_forward        = each.value.rules.non_fast_forward
+    required_signatures     = each.value.rules.required_signatures
+    required_linear_history = each.value.rules.required_linear_history
+
+    dynamic "pull_request" {
+      for_each = each.value.rules.pull_request != null ? [each.value.rules.pull_request] : []
+      content {
+        required_approving_review_count   = pull_request.value.required_approving_review_count
+        require_code_owner_review         = pull_request.value.require_code_owner_review
+        require_last_push_approval        = pull_request.value.require_last_push_approval
+        dismiss_stale_reviews_on_push     = pull_request.value.dismiss_stale_reviews_on_push
+        required_review_thread_resolution = pull_request.value.required_review_thread_resolution
+      }
+    }
   }
 }
diff --git a/modules/organization/tests/organization.tftest.hcl b/modules/organization/tests/organization.tftest.hcl
new file mode 100644
index 0000000..4fb663d
--- /dev/null
+++ b/modules/organization/tests/organization.tftest.hcl
@@ -0,0 +1,84 @@
+mock_provider "github" {}
+
+run "generic_ruleset_passes_through" {
+  command = plan
+
+  variables {
+    organization_rulesets = {
+      "No Force Push" = {
+        include_refs  = ["~DEFAULT_BRANCH"]
+        bypass_actors = [{ actor_type = "OrganizationAdmin" }]
+        rules         = { non_fast_forward = true }
+      }
+    }
+  }
+
+  assert {
+    condition     = github_organization_ruleset.internal["No Force Push"].rules[0].non_fast_forward
+    error_message = "A generic ruleset must pass its rules through to github_organization_ruleset."
+  }
+  assert {
+    condition     = one(github_organization_ruleset.internal["No Force Push"].bypass_actors).actor_id == 1
+    error_message = "OrganizationAdmin bypass must coerce actor_id to 1."
+  }
+}
+
+run "rejects_bad_enforcement" {
+  command = plan
+  variables {
+    organization_rulesets = {
+      bad = { enforcement = "sometimes", rules = {} }
+    }
+  }
+  expect_failures = [var.organization_rulesets]
+}
+
+run "default_presets_reproduce_prior_behavior" {
+  command = plan
+
+  assert {
+    condition     = github_organization_ruleset.internal["require_signed_commits"].rules[0].required_signatures
+    error_message = "require_signed_commits preset must enable required_signatures."
+  }
+  assert {
+    condition     = github_organization_ruleset.internal["require_pull_request_reviews"].rules[0].pull_request[0].required_approving_review_count == 1
+    error_message = "require_pull_request_reviews preset must require one approval."
+  }
+  assert {
+    condition     = github_organization_ruleset.internal["restrict_deletions"].rules[0].deletion
+    error_message = "restrict_deletions preset must enable deletion protection."
+  }
+  assert {
+    condition     = length(github_organization_ruleset.internal["require_signed_commits"].bypass_actors) == 0
+    error_message = "require_signed_commits must have no bypass actors."
+  }
+}
+
+run "signed_commits_exclusion_feeds_preset" {
+  command = plan
+  variables {
+    signed_commits_excluded_repositories = ["legacy-repo"]
+  }
+  assert {
+    condition     = contains(github_organization_ruleset.internal["require_signed_commits"].conditions[0].repository_name[0].exclude, "legacy-repo")
+    error_message = "signed_commits_excluded_repositories must feed the require_signed_commits preset's exclusions."
+  }
+}
+
+run "custom_ruleset_overrides_preset_by_name" {
+  command = plan
+  variables {
+    enabled_presets = ["require_signed_commits"]
+    organization_rulesets = {
+      require_signed_commits = {
+        include_refs  = ["~ALL"]
+        bypass_actors = [{ actor_type = "OrganizationAdmin" }]
+        rules         = { required_signatures = true }
+      }
+    }
+  }
+  assert {
+    condition     = one(github_organization_ruleset.internal["require_signed_commits"].bypass_actors).actor_id == 1
+    error_message = "A custom organization_rulesets entry must override the preset of the same name."
+  }
+}
diff --git a/modules/organization/variables.tf b/modules/organization/variables.tf
index 1a1f793..e4c0a73 100644
--- a/modules/organization/variables.tf
+++ b/modules/organization/variables.tf
@@ -14,29 +14,62 @@ variable "owners" {
   default     = []
 }
 
-variable "baseline_ruleset" {
+variable "organization_rulesets" {
   description = <<-EOT
-    Baseline org-wide branch-protection ruleset applied to the default branch of
-    every repository. Set `enabled = false` to disable it entirely. Defaults
-    reproduce a require-review + code-owner-review + thread-resolution policy.
+    Organization rulesets, keyed by name. Merged with (and overridden by name by)
+    the presets selected via enabled_presets. bypass_actors uses raw numeric
+    actor_id (OrganizationAdmin needs none); team-name bypass is per-repo only.
   EOT
-  type = object({
-    enabled                           = optional(bool, true)
-    block_deletion                    = optional(bool, true)
-    block_force_pushes                = optional(bool, false)
-    required_approving_review_count   = optional(number, 1)
-    require_code_owner_review         = optional(bool, true)
-    require_last_push_approval        = optional(bool, false)
-    dismiss_stale_reviews_on_push     = optional(bool, false)
-    required_review_thread_resolution = optional(bool, true)
-  })
+  type = map(object({
+    enforcement          = optional(string, "active")
+    target               = optional(string, "branch")
+    include_refs         = optional(list(string), ["~ALL"])
+    exclude_refs         = optional(list(string), [])
+    include_repositories = optional(list(string), ["~ALL"])
+    exclude_repositories = optional(list(string), [])
+    bypass_actors = optional(list(object({
+      actor_type  = string
+      actor_id    = optional(number, 0)
+      bypass_mode = optional(string, "always")
+    })), [])
+    rules = object({
+      creation                = optional(bool, false)
+      update                  = optional(bool, false)
+      deletion                = optional(bool, false)
+      non_fast_forward        = optional(bool, false)
+      required_signatures     = optional(bool, false)
+      required_linear_history = optional(bool, false)
+      pull_request = optional(object({
+        required_approving_review_count   = optional(number, 0)
+        require_code_owner_review         = optional(bool, false)
+        require_last_push_approval        = optional(bool, false)
+        dismiss_stale_reviews_on_push     = optional(bool, false)
+        required_review_thread_resolution = optional(bool, false)
+      }))
+    })
+  }))
   default = {}
-}
 
-variable "require_signed_commits" {
-  description = "Require signed commits on all branches of all repositories (except those excluded)."
-  type        = bool
-  default     = true
+  validation {
+    condition = alltrue([for r in values(var.organization_rulesets) :
+    contains(["active", "evaluate", "disabled"], r.enforcement)])
+    error_message = "Ruleset enforcement must be one of: active, evaluate, disabled."
+  }
+  validation {
+    condition = alltrue([for r in values(var.organization_rulesets) :
+    contains(["branch", "tag"], r.target)])
+    error_message = "Ruleset target must be one of: branch, tag."
+  }
+  validation {
+    condition = alltrue(flatten([for r in values(var.organization_rulesets) :
+    [for b in r.bypass_actors : contains(["OrganizationAdmin", "RepositoryRole", "Team", "Integration", "DeployKey"], b.actor_type)]]))
+    error_message = "bypass_actors.actor_type must be one of: OrganizationAdmin, RepositoryRole, Team, Integration, DeployKey."
+  }
+  validation {
+    condition = alltrue(flatten([for r in values(var.organization_rulesets) :
+    [for b in r.bypass_actors : contains(["always", "pull_request"], b.bypass_mode)]]))
+    error_message = "bypass_actors.bypass_mode must be one of: always, pull_request."
+  }
 }
 
 variable "signed_commits_excluded_repositories" {
@@ -44,3 +77,17 @@ variable "signed_commits_excluded_repositories" {
   type        = list(string)
   default     = []
 }
+
+variable "enabled_presets" {
+  description = "Names of built-in ruleset presets to enable. See modules/organization/main.tf local.presets."
+  type        = list(string)
+  default     = ["require_pull_request_reviews", "restrict_deletions", "require_signed_commits"]
+
+  validation {
+    condition = alltrue([for p in var.enabled_presets : contains([
+      "require_pull_request_reviews", "restrict_deletions", "require_signed_commits",
+      "block_force_pushes", "require_linear_history",
+    ], p)])
+    error_message = "enabled_presets entries must be known preset names."
+  }
+}
diff --git a/modules/repository/README.md b/modules/repository/README.md
index 7983b41..237f9d6 100644
--- a/modules/repository/README.md
+++ b/modules/repository/README.md
@@ -37,6 +37,7 @@ No modules.
 | [github_repository.internal](https://registry.terraform.io/providers/integrations/github/latest/docs/resources/repository) | resource |
 | [github_repository_environment.internal](https://registry.terraform.io/providers/integrations/github/latest/docs/resources/repository_environment) | resource |
 | [github_repository_environment_deployment_policy.internal](https://registry.terraform.io/providers/integrations/github/latest/docs/resources/repository_environment_deployment_policy) | resource |
+| [github_repository_ruleset.internal](https://registry.terraform.io/providers/integrations/github/latest/docs/resources/repository_ruleset) | resource |
 | [github_repository_vulnerability_alerts.internal](https://registry.terraform.io/providers/integrations/github/latest/docs/resources/repository_vulnerability_alerts) | resource |
 | [github_team_repository.everyone](https://registry.terraform.io/providers/integrations/github/latest/docs/resources/team_repository) | resource |
 | [github_team_repository.internal](https://registry.terraform.io/providers/integrations/github/latest/docs/resources/team_repository) | resource |
@@ -46,7 +47,7 @@ No modules.
 | Name | Description | Type | Default | Required |
 | ---- | ----------- | ---- | ------- | :------: |
 | <a name="input_all_members_team_id"></a> [all\_members\_team\_id](#input\_all\_members\_team\_id) | ID of the all-members team that receives default read access on non-restricted repositories. null disables the default read grant. | `string` | `null` | no |
-| <a name="input_repositories"></a> [repositories](#input\_repositories) | Repositories to manage and which teams may access them. `readers`, `writers`<br/>and `admins` reference team names from `var.teams`. A team listed at more than<br/>one level gets the highest permission (admin > write > read). Set<br/>`restricted = true` to withhold the default all-members read grant. | <pre>list(object({<br/>    name        = string<br/>    description = string<br/>    visibility  = optional(string, "private")<br/>    readers     = optional(list(string), [])<br/>    writers     = optional(list(string), [])<br/>    admins      = optional(list(string), [])<br/>    restricted  = optional(bool, false)<br/><br/>    topics             = optional(list(string), [])<br/>    homepage_url       = optional(string, null)<br/>    has_issues         = optional(bool, true)<br/>    has_wiki           = optional(bool, false)<br/>    has_projects       = optional(bool, false)<br/>    has_downloads      = optional(bool, true)<br/>    is_template        = optional(bool, false)<br/>    gitignore_template = optional(string, null)<br/>    license_template   = optional(string, null)<br/>    archived           = optional(bool, false)<br/>    archive_on_destroy = optional(bool, false)<br/>    default_branch     = optional(string, null)<br/>    enable_pages       = optional(bool, false)<br/>    signed_commits     = optional(bool, true)<br/><br/>    allow_merge_commit     = optional(bool, true)<br/>    allow_squash_merge     = optional(bool, false)<br/>    allow_rebase_merge     = optional(bool, false)<br/>    allow_auto_merge       = optional(bool, true)<br/>    delete_branch_on_merge = optional(bool, true)<br/>    merge_commit_message   = optional(string, "PR_BODY")<br/>    merge_commit_title     = optional(string, "PR_TITLE")<br/><br/>    template = optional(object({<br/>      owner                = string<br/>      repository           = string<br/>      include_all_branches = optional(bool, false)<br/>    }))<br/><br/>    variables = optional(map(string), {})<br/>    environments = optional(map(object({<br/>      variables  = optional(map(string), {})<br/>      reviewers  = optional(list(string), [])<br/>      wait_timer = optional(number, 0)<br/>      deployment_branch_policy = optional(object({<br/>        protected_branches     = optional(bool, false)<br/>        custom_branch_policies = optional(list(string), [])<br/>      }))<br/>    })), {})<br/>  }))</pre> | `[]` | no |
+| <a name="input_repositories"></a> [repositories](#input\_repositories) | Repositories to manage and which teams may access them. `readers`, `writers`<br/>and `admins` reference team names from `var.teams`. A team listed at more than<br/>one level gets the highest permission (admin > write > read). Set<br/>`restricted = true` to withhold the default all-members read grant. | <pre>list(object({<br/>    name        = string<br/>    description = string<br/>    visibility  = optional(string, "private")<br/>    readers     = optional(list(string), [])<br/>    writers     = optional(list(string), [])<br/>    admins      = optional(list(string), [])<br/>    restricted  = optional(bool, false)<br/><br/>    topics             = optional(list(string), [])<br/>    homepage_url       = optional(string, null)<br/>    has_issues         = optional(bool, true)<br/>    has_wiki           = optional(bool, false)<br/>    has_projects       = optional(bool, false)<br/>    has_downloads      = optional(bool, true)<br/>    is_template        = optional(bool, false)<br/>    gitignore_template = optional(string, null)<br/>    license_template   = optional(string, null)<br/>    archived           = optional(bool, false)<br/>    archive_on_destroy = optional(bool, false)<br/>    default_branch     = optional(string, null)<br/>    enable_pages       = optional(bool, false)<br/>    signed_commits     = optional(bool, true)<br/><br/>    allow_merge_commit     = optional(bool, true)<br/>    allow_squash_merge     = optional(bool, false)<br/>    allow_rebase_merge     = optional(bool, false)<br/>    allow_auto_merge       = optional(bool, true)<br/>    delete_branch_on_merge = optional(bool, true)<br/>    merge_commit_message   = optional(string, "PR_BODY")<br/>    merge_commit_title     = optional(string, "PR_TITLE")<br/><br/>    template = optional(object({<br/>      owner                = string<br/>      repository           = string<br/>      include_all_branches = optional(bool, false)<br/>    }))<br/><br/>    rulesets = optional(map(object({<br/>      enforcement  = optional(string, "active")<br/>      target       = optional(string, "branch")<br/>      include_refs = optional(list(string), ["~ALL"])<br/>      exclude_refs = optional(list(string), [])<br/>      bypass_actors = optional(list(object({<br/>        actor_type  = string<br/>        actor_id    = optional(number, 0)<br/>        team        = optional(string)<br/>        bypass_mode = optional(string, "always")<br/>      })), [])<br/>      rules = object({<br/>        creation                = optional(bool, false)<br/>        update                  = optional(bool, false)<br/>        deletion                = optional(bool, false)<br/>        non_fast_forward        = optional(bool, false)<br/>        required_signatures     = optional(bool, false)<br/>        required_linear_history = optional(bool, false)<br/>        pull_request = optional(object({<br/>          required_approving_review_count   = optional(number, 0)<br/>          require_code_owner_review         = optional(bool, false)<br/>          require_last_push_approval        = optional(bool, false)<br/>          dismiss_stale_reviews_on_push     = optional(bool, false)<br/>          required_review_thread_resolution = optional(bool, false)<br/>        }))<br/>      })<br/>    })), {})<br/><br/>    variables = optional(map(string), {})<br/>    environments = optional(map(object({<br/>      variables  = optional(map(string), {})<br/>      reviewers  = optional(list(string), [])<br/>      wait_timer = optional(number, 0)<br/>      deployment_branch_policy = optional(object({<br/>        protected_branches     = optional(bool, false)<br/>        custom_branch_policies = optional(list(string), [])<br/>      }))<br/>    })), {})<br/>  }))</pre> | `[]` | no |
 | <a name="input_repository_secrets"></a> [repository\_secrets](#input\_repository\_secrets) | Per-repository Actions and environment secret values (plaintext), keyed by<br/>repository name. Supplied already-decrypted by the caller; this module never<br/>performs decryption. | <pre>map(object({<br/>    actions      = optional(map(string), {})<br/>    environments = optional(map(map(string)), {})<br/>  }))</pre> | `{}` | no |
 | <a name="input_teams"></a> [teams](#input\_teams) | Map of team name => { id, slug } for teams that may be granted repository access or set as environment reviewers. Supplied by the teams module. | <pre>map(object({<br/>    id   = string<br/>    slug = string<br/>  }))</pre> | `{}` | no |
 
diff --git a/modules/repository/main.tf b/modules/repository/main.tf
index 2ba5d3e..07da275 100644
--- a/modules/repository/main.tf
+++ b/modules/repository/main.tf
@@ -95,6 +95,70 @@ resource "github_branch_default" "internal" {
   branch     = each.value
 }
 
+#
+# Per-repository rulesets, with team-name bypass resolution via var.teams.
+#
+
+locals {
+  # "<repo>:<ruleset>" => { repository, name, config }
+  repository_rulesets = merge([
+    for r in var.repositories : {
+      for name, cfg in r.rulesets :
+      "${r.name}:${name}" => { repository = r.name, name = name, config = cfg }
+    }
+  ]...)
+}
+
+resource "github_repository_ruleset" "internal" {
+  for_each = local.repository_rulesets
+
+  name        = each.value.name
+  repository  = github_repository.internal[each.value.repository].name
+  enforcement = each.value.config.enforcement
+  target      = each.value.config.target
+
+  conditions {
+    ref_name {
+      include = each.value.config.include_refs
+      exclude = each.value.config.exclude_refs
+    }
+  }
+
+  dynamic "bypass_actors" {
+    for_each = each.value.config.bypass_actors
+    content {
+      actor_id = (
+        bypass_actors.value.actor_type == "OrganizationAdmin" ? 1 :
+        bypass_actors.value.actor_type == "Team" && bypass_actors.value.team != null ?
+        tonumber(var.teams[bypass_actors.value.team].id) :
+        bypass_actors.value.actor_id
+      )
+      actor_type  = bypass_actors.value.actor_type
+      bypass_mode = bypass_actors.value.bypass_mode
+    }
+  }
+
+  rules {
+    creation                = each.value.config.rules.creation
+    update                  = each.value.config.rules.update
+    deletion                = each.value.config.rules.deletion
+    non_fast_forward        = each.value.config.rules.non_fast_forward
+    required_signatures     = each.value.config.rules.required_signatures
+    required_linear_history = each.value.config.rules.required_linear_history
+
+    dynamic "pull_request" {
+      for_each = each.value.config.rules.pull_request != null ? [each.value.config.rules.pull_request] : []
+      content {
+        required_approving_review_count   = pull_request.value.required_approving_review_count
+        require_code_owner_review         = pull_request.value.require_code_owner_review
+        require_last_push_approval        = pull_request.value.require_last_push_approval
+        dismiss_stale_reviews_on_push     = pull_request.value.dismiss_stale_reviews_on_push
+        required_review_thread_resolution = pull_request.value.required_review_thread_resolution
+      }
+    }
+  }
+}
+
 #
 # One team-repository grant per repository-team pair. A team listed at more than
 # one level gets the highest permission (merge order: admins > writers > readers).
diff --git a/modules/repository/tests/repository.tftest.hcl b/modules/repository/tests/repository.tftest.hcl
index 9b22ac3..60f7207 100644
--- a/modules/repository/tests/repository.tftest.hcl
+++ b/modules/repository/tests/repository.tftest.hcl
@@ -219,3 +219,56 @@ run "rejects_disabling_all_merge_methods" {
 
   expect_failures = [var.repositories]
 }
+
+run "per_repo_ruleset_with_team_bypass" {
+  command = plan
+  variables {
+    repositories = [{
+      name        = "app"
+      description = ""
+      rulesets = {
+        "Protect main" = {
+          include_refs  = ["~DEFAULT_BRANCH"]
+          bypass_actors = [{ actor_type = "Team", team = "platform" }]
+          rules         = { non_fast_forward = true, pull_request = { required_approving_review_count = 2 } }
+        }
+      }
+    }]
+  }
+  assert {
+    condition     = github_repository_ruleset.internal["app:Protect main"].rules[0].pull_request[0].required_approving_review_count == 2
+    error_message = "Per-repo ruleset rules must pass through."
+  }
+  assert {
+    condition     = one(github_repository_ruleset.internal["app:Protect main"].bypass_actors).actor_id == 1
+    error_message = "Team bypass 'platform' must resolve to team id 1."
+  }
+}
+
+run "rejects_ruleset_bypass_unknown_team" {
+  command = plan
+  variables {
+    repositories = [{
+      name        = "app"
+      description = ""
+      rulesets = {
+        r = { bypass_actors = [{ actor_type = "Team", team = "ghost" }], rules = {} }
+      }
+    }]
+  }
+  expect_failures = [var.repositories]
+}
+
+run "rejects_invalid_ruleset_enforcement" {
+  command = plan
+  variables {
+    repositories = [{
+      name        = "app"
+      description = ""
+      rulesets = {
+        r = { enforcement = "sometimes", rules = {} }
+      }
+    }]
+  }
+  expect_failures = [var.repositories]
+}
diff --git a/modules/repository/variables.tf b/modules/repository/variables.tf
index f70558f..d54f304 100644
--- a/modules/repository/variables.tf
+++ b/modules/repository/variables.tf
@@ -43,6 +43,34 @@ variable "repositories" {
       include_all_branches = optional(bool, false)
     }))
 
+    rulesets = optional(map(object({
+      enforcement  = optional(string, "active")
+      target       = optional(string, "branch")
+      include_refs = optional(list(string), ["~ALL"])
+      exclude_refs = optional(list(string), [])
+      bypass_actors = optional(list(object({
+        actor_type  = string
+        actor_id    = optional(number, 0)
+        team        = optional(string)
+        bypass_mode = optional(string, "always")
+      })), [])
+      rules = object({
+        creation                = optional(bool, false)
+        update                  = optional(bool, false)
+        deletion                = optional(bool, false)
+        non_fast_forward        = optional(bool, false)
+        required_signatures     = optional(bool, false)
+        required_linear_history = optional(bool, false)
+        pull_request = optional(object({
+          required_approving_review_count   = optional(number, 0)
+          require_code_owner_review         = optional(bool, false)
+          require_last_push_approval        = optional(bool, false)
+          dismiss_stale_reviews_on_push     = optional(bool, false)
+          required_review_thread_resolution = optional(bool, false)
+        }))
+      })
+    })), {})
+
     variables = optional(map(string), {})
     environments = optional(map(object({
       variables  = optional(map(string), {})
@@ -109,6 +137,74 @@ variable "repositories" {
     ])
     error_message = "At least one merge method (allow_merge_commit, allow_squash_merge, allow_rebase_merge) must be enabled on: ${join(", ", [for r in var.repositories : r.name if !(r.allow_merge_commit || r.allow_squash_merge || r.allow_rebase_merge)])}."
   }
+
+  validation {
+    condition = alltrue(flatten([
+      for r in var.repositories : [
+        for rs in values(r.rulesets) : [
+          for b in rs.bypass_actors :
+          b.actor_type != "Team" || b.team == null || contains(keys(var.teams), b.team)
+        ]
+      ]
+    ]))
+    error_message = "Ruleset bypass_actors reference a team not present in var.teams."
+  }
+
+  validation {
+    condition = alltrue(flatten([
+      for r in var.repositories : [
+        for rs in values(r.rulesets) :
+        contains(["active", "evaluate", "disabled"], rs.enforcement)
+      ]
+    ]))
+    error_message = "Ruleset enforcement must be one of: active, evaluate, disabled."
+  }
+
+  validation {
+    condition = alltrue(flatten([
+      for r in var.repositories : [
+        for rs in values(r.rulesets) :
+        contains(["branch", "tag"], rs.target)
+      ]
+    ]))
+    error_message = "Ruleset target must be one of: branch, tag."
+  }
+
+  validation {
+    condition = alltrue(flatten([
+      for r in var.repositories : [
+        for rs in values(r.rulesets) : [
+          for b in rs.bypass_actors :
+          contains(["OrganizationAdmin", "RepositoryRole", "Team", "Integration", "DeployKey"], b.actor_type)
+        ]
+      ]
+    ]))
+    error_message = "Ruleset bypass_actors.actor_type must be one of: OrganizationAdmin, RepositoryRole, Team, Integration, DeployKey."
+  }
+
+  validation {
+    condition = alltrue(flatten([
+      for r in var.repositories : [
+        for rs in values(r.rulesets) : [
+          for b in rs.bypass_actors :
+          contains(["always", "pull_request"], b.bypass_mode)
+        ]
+      ]
+    ]))
+    error_message = "Ruleset bypass_actors.bypass_mode must be one of: always, pull_request."
+  }
+
+  validation {
+    condition = alltrue(flatten([
+      for r in var.repositories : [
+        for rs in values(r.rulesets) : [
+          for b in rs.bypass_actors :
+          b.actor_type != "Team" || b.team != null || b.actor_id != 0
+        ]
+      ]
+    ]))
+    error_message = "Ruleset bypass_actors with actor_type = \"Team\" must set either team (a team name) or a non-default actor_id (a raw team id) — not neither."
+  }
 }
 
 variable "teams" {
diff --git a/variables.tf b/variables.tf
index 567c088..1a00cf7 100644
--- a/variables.tf
+++ b/variables.tf
@@ -92,6 +92,34 @@ variable "repositories" {
       include_all_branches = optional(bool, false)
     }))
 
+    rulesets = optional(map(object({
+      enforcement  = optional(string, "active")
+      target       = optional(string, "branch")
+      include_refs = optional(list(string), ["~ALL"])
+      exclude_refs = optional(list(string), [])
+      bypass_actors = optional(list(object({
+        actor_type  = string
+        actor_id    = optional(number, 0)
+        team        = optional(string)
+        bypass_mode = optional(string, "always")
+      })), [])
+      rules = object({
+        creation                = optional(bool, false)
+        update                  = optional(bool, false)
+        deletion                = optional(bool, false)
+        non_fast_forward        = optional(bool, false)
+        required_signatures     = optional(bool, false)
+        required_linear_history = optional(bool, false)
+        pull_request = optional(object({
+          required_approving_review_count   = optional(number, 0)
+          require_code_owner_review         = optional(bool, false)
+          require_last_push_approval        = optional(bool, false)
+          dismiss_stale_reviews_on_push     = optional(bool, false)
+          required_review_thread_resolution = optional(bool, false)
+        }))
+      })
+    })), {})
+
     variables = optional(map(string), {})
     environments = optional(map(object({
       variables  = optional(map(string), {})
@@ -148,25 +176,76 @@ variable "organization_variables" {
   }
 }
 
-variable "baseline_ruleset" {
-  description = "Baseline org-wide branch-protection ruleset. See the organization submodule for the object schema; set enabled = false to disable."
-  type = object({
-    enabled                           = optional(bool, true)
-    block_deletion                    = optional(bool, true)
-    block_force_pushes                = optional(bool, false)
-    required_approving_review_count   = optional(number, 1)
-    require_code_owner_review         = optional(bool, true)
-    require_last_push_approval        = optional(bool, false)
-    dismiss_stale_reviews_on_push     = optional(bool, false)
-    required_review_thread_resolution = optional(bool, true)
-  })
+variable "organization_rulesets" {
+  description = <<-EOT
+    Organization rulesets, keyed by name. Merged with (and overridden by name by)
+    the presets selected via enabled_presets. bypass_actors uses raw numeric
+    actor_id (OrganizationAdmin needs none); team-name bypass is per-repo only.
+  EOT
+  type = map(object({
+    enforcement          = optional(string, "active")
+    target               = optional(string, "branch")
+    include_refs         = optional(list(string), ["~ALL"])
+    exclude_refs         = optional(list(string), [])
+    include_repositories = optional(list(string), ["~ALL"])
+    exclude_repositories = optional(list(string), [])
+    bypass_actors = optional(list(object({
+      actor_type  = string
+      actor_id    = optional(number, 0)
+      bypass_mode = optional(string, "always")
+    })), [])
+    rules = object({
+      creation                = optional(bool, false)
+      update                  = optional(bool, false)
+      deletion                = optional(bool, false)
+      non_fast_forward        = optional(bool, false)
+      required_signatures     = optional(bool, false)
+      required_linear_history = optional(bool, false)
+      pull_request = optional(object({
+        required_approving_review_count   = optional(number, 0)
+        require_code_owner_review         = optional(bool, false)
+        require_last_push_approval        = optional(bool, false)
+        dismiss_stale_reviews_on_push     = optional(bool, false)
+        required_review_thread_resolution = optional(bool, false)
+      }))
+    })
+  }))
   default = {}
+
+  validation {
+    condition = alltrue([for r in values(var.organization_rulesets) :
+    contains(["active", "evaluate", "disabled"], r.enforcement)])
+    error_message = "Ruleset enforcement must be one of: active, evaluate, disabled."
+  }
+  validation {
+    condition = alltrue([for r in values(var.organization_rulesets) :
+    contains(["branch", "tag"], r.target)])
+    error_message = "Ruleset target must be one of: branch, tag."
+  }
+  validation {
+    condition = alltrue(flatten([for r in values(var.organization_rulesets) :
+    [for b in r.bypass_actors : contains(["OrganizationAdmin", "RepositoryRole", "Team", "Integration", "DeployKey"], b.actor_type)]]))
+    error_message = "bypass_actors.actor_type must be one of: OrganizationAdmin, RepositoryRole, Team, Integration, DeployKey."
+  }
+  validation {
+    condition = alltrue(flatten([for r in values(var.organization_rulesets) :
+    [for b in r.bypass_actors : contains(["always", "pull_request"], b.bypass_mode)]]))
+    error_message = "bypass_actors.bypass_mode must be one of: always, pull_request."
+  }
 }
 
-variable "require_signed_commits" {
-  description = "Require signed commits on all branches of all repositories (except repositories with signed_commits = false)."
-  type        = bool
-  default     = true
+variable "enabled_presets" {
+  description = "Names of built-in ruleset presets to enable. See modules/organization/main.tf local.presets."
+  type        = list(string)
+  default     = ["require_pull_request_reviews", "restrict_deletions", "require_signed_commits"]
+
+  validation {
+    condition = alltrue([for p in var.enabled_presets : contains([
+      "require_pull_request_reviews", "restrict_deletions", "require_signed_commits",
+      "block_force_pushes", "require_linear_history",
+    ], p)])
+    error_message = "enabled_presets entries must be known preset names."
+  }
 }
 
 variable "create_all_members_team" {