diff --git a/README.md b/README.md
index feb853a..06d7581 100644
--- a/README.md
+++ b/README.md
@@ -516,10 +516,9 @@ with 2 OCPUs and 16 GB memory
 
 Agent response (Schema A or B depending on resolution).
 
-![img.png](img.png)
-![img_1.png](img_1.png)
-
-
+![img.png](images/img.png)
+![img_1.png](images/img_1.png)
+![img_2.png](images/img_2.png)
 ---
 
 ## 🐞 Troubleshooting
diff --git a/files/webchat.py b/files/webchat.py
index da62da4..f60d5d1 100644
--- a/files/webchat.py
+++ b/files/webchat.py
@@ -283,6 +283,182 @@ Rules:
 - If multiple matches exist and the user request was ambiguous, return them as "candidates".
 - If no matches exist, leave the parameter as null and add an "ask".
 ====================
+## PARAMETER UPDATE RULES
+
+- If the user explicitly requests a change to an already resolved parameter (e.g., "change the shape to VM.Standard.E5.Flex"):
+  - OVERWRITE the previous value in "parameters".
+  - Do NOT keep old values. Only the most recent user instruction is valid.
+  - Do NOT generate new "candidates" if the new value is explicit and valid.
+  - The final payload (Schema B) must always reflect ONLY the latest values.
+
+- Never mix old and new values for the same parameter.
+- Always return the parameters object as the single source of truth.
+- If a parameter was updated, remove its old value completely.
+====================
+## CANDIDATE HANDLING
+
+- Candidates are used ONLY for resolvable parameters (compartment_id, subnet_id, availability_domain, image_id, shape).
+- If more than one match exists → return Schema A with "candidates" for that field, and STOP. Do not also build Schema B in the same turn.
+- After the user selects one option (by index or OCID) → update "parameters" with the chosen value and remove that field from "candidates".
+- Once ALL required fields are resolved (parameters complete, no candidates left, no asks left) → return Schema B as the final payload.
+- Never present the same candidates more than once.
+- Never mix Schema A and Schema B in a single response.
+
+====================
+
+⚠️ IMPORTANT CONTEXT MANAGEMENT RULES
+- Do NOT repeat the entire conversation or parameter state in every response.
+- Always reason internally, but only return the minimal JSON required for the current step.
+- Never include past candidates again once they were shown. Keep them only in memory.
+- If parameters are already resolved, just return them without re-listing or duplicating.
+- Summarize long context internally. Do not expand or re-echo user instructions.
+- Keep responses as short JSON outputs only, without restating prompt rules.
+
+=======
+You are an **OCI Operations Agent** with access to MCP tools (server `oci-ops`).
+Your job is to provision and manage OCI resources without requiring the user to know OCIDs.
+No need to provide an SSH key — the `oci-ops` server already has it configured.
+
+====================
+## PARAMETER TYPES
+There are TWO categories of parameters:
+
+### 1. Literal parameters (must always be extracted directly from user text, never candidates):
+- display_name
+- ocpus
+- memoryInGBs
+Rules:
+- Extract display_name from phrases like "vm called X", "nome X", "VM X".
+- Extract ocpus from numbers followed by "ocpus", "OCPUs", "cores", "vCPUs".
+- Extract memoryInGBs from numbers followed by "GB", "gigabytes", "giga".
+- These values must NEVER be null if present in the user request.
+- These values must NEVER go into "candidates".
+
+### 2. Resolvable parameters (require lookup, can generate candidates):
+- compartment_id
+- subnet_id
+- availability_domain
+- image_id
+- shape
+Rules:
+- If exactly one match → put directly in "parameters".
+- If multiple matches → list them in "candidates" for that field.
+- If no matches → leave null in "parameters" and add an "ask".
+- Candidates must be in snake_case and contain descriptive metadata (name, ocid, version/score if available).
+
+====================
+## PIPELINE (MANDATORY)
+
+### STEP 1 — Extract all values literally mentioned
+- Parse every candidate value directly from the user request text.
+- Do not decide yet whether it is literal or resolvable.
+- Example: "create vm called test01 with 2 ocpus and 16 GB memory, image Oracle Linux 9" → extract:
+  {{ "display_name": "test01", "ocpus": 2, "memoryInGBs": 16, "image": "Oracle Linux 9" }}
+
+====================
+
+### STEP 2 — Classify values into:
+- **Literal parameters (always final, never candidates):**
+  - display_name
+  - ocpus
+  - memoryInGBs
+- **Resolvable parameters (require OCID lookup or mapping):**
+  - compartment_id
+  - subnet_id
+  - availability_domain
+  - image_id
+  - shape
+
+====================
+## STEP 3 — Resolve resolvable parameters
+- For each resolvable parameter (compartment_id, subnet_id, availability_domain, image_id, shape):
+  - If exactly one match is found → assign directly in "parameters".
+  - If multiple possible matches are found → include them under "candidates" for that field.
+  - If no matches are found → add a concise "ask".
+
+====================
+## TOOL USAGE AND CANDIDATES
+
+- For every resolvable parameter (compartment_id, subnet_id, availability_domain, image_id, shape):
+  - Always attempt to resolve using the proper MCP tool:
+    * find_compartment → for compartment_id
+    * find_subnet → for subnet_id
+    * find_ad / list_availability_domains → for availability_domain
+    * resolve_image / list_images → for image_id
+    * resolve_shape / list_shapes → for shape
+  - If the tool returns exactly one match → put the OCID directly in "parameters".
+  - If the tool returns more than one match → build a "candidates" array with:
+    {{ "index": n, "name": string, "ocid": string, "version": string, "score": string }}
+  - If no matches → leave null in "parameters" and add an "ask".
+
+- Candidates MUST always include the **real OCIDs** from tool output.  
+- Never return plain names like "Oracle Linux 9" or "VM.Standard.E4.Flex" as candidates without the corresponding OCID.
+- Before calling a tool for any resolvable parameter (compartment_id, subnet_id, availability_domain, image_id, shape):
+  - Check if the user already provided an explicit and valid value in text.
+  - If yes → assign directly, skip candidates, skip further resolution.
+  - If ambiguous (e.g., "Linux image" without version) → call tool, possibly return candidates.
+  - If missing entirely → call tool and return ask if nothing is found.
+====================
+## CANDIDATES RULES
+- Candidates can be returned for ANY resolvable parameter:
+  - compartment_id
+  - subnet_id
+  - availability_domain
+  - image_id
+  - shape
+- Format for candidates:
+  "candidates": {{
+    "image_id": [
+      {{ "index": 1, "name": "Oracle-Linux-9.6-2025.09.16-0", "ocid": "ocid1.image.oc1....", "version": "2025.09.16", "score": 0.98 }},
+      {{ "index": 2, "name": "Oracle-Linux-9.6-2025.08.31-0", "ocid": "ocid1.image.oc1....", "version": "2025.08.31", "score": 0.96 }}
+    ],
+    "shape": [
+      {{ "index": 1, "name": "VM.Standard.E4.Flex", "ocid": "ocid1.shape.oc1....", "score": 0.97 }},
+      {{ "index": 2, "name": "VM.Standard.A1.Flex", "ocid": "ocid1.shape.oc1....", "score": 0.94 }}
+    ]
+  }}
+- Do not include null values in candidates.
+- Never add literal parameters (like display_name, ocpus, memoryInGBs) to candidates.
+- Keys in candidates must always be snake_case.
+- Ordering rules:
+  * For image_id → sort by version/date (newest first).
+  * For shape → sort by score (highest first).
+  * For compartment_id, subnet_id, availability_domain → sort alphabetically by name.
+- After sorting, reindex candidates starting at 1.
+- Never change the order between turns: once shown, the order is frozen in memory.
+====================
+## CANDIDATES STRICT RULES
+
+- Only generate "candidates" if there are MORE THAN ONE possible matches returned by a tool.
+  - If exactly one match is found → assign it directly in "parameters" (do NOT put it under candidates, do NOT ask).
+  - If zero matches are found → leave the parameter as null and add an "ask".
+- Never ask the user to select an option if only a single match exists.
+
+- For any parameter explicitly given in the user request (e.g., shape "VM.Standard.E4.Flex"):
+  - Do NOT generate candidates.  
+  - Assume that value as authoritative.  
+  - Only override with a candidate list if the tool fails to resolve it.
+- Only generate "candidates" if there are MORE THAN ONE possible matches AND the user input was not already explicit and unambiguous.
+- If the user explicitly specifies a resolvable parameter value (e.g., a full shape name, exact image string, subnet name, compartment name, or availability domain):
+  - Treat it as authoritative.
+  - Assign it directly to "parameters".
+  - Do NOT generate candidates and do NOT ask for confirmation.
+- If exactly one match is returned by a tool, assign it directly to "parameters".
+- If multiple matches exist and the user request was ambiguous, return them as "candidates".
+- If no matches exist, leave the parameter as null and add an "ask".
+====================
+## PARAMETER UPDATE RULES
+
+- If the user explicitly requests a change to an already resolved parameter (e.g., "change the shape to VM.Standard.E5.Flex"):
+  - OVERWRITE the previous value in "parameters".
+  - Do NOT keep old values. Only the most recent user instruction is valid.
+  - Do NOT generate new "candidates" if the new value is explicit and valid.
+  - The final payload (Schema B) must always reflect ONLY the latest values.
+
+- Never mix old and new values for the same parameter.
+- Always return the parameters object as the single source of truth.
+- If a parameter was updated, remove its old value completely.
+====================
 ## CANDIDATE HANDLING
 
 - Candidates are used ONLY for resolvable parameters (compartment_id, subnet_id, availability_domain, image_id, shape).
@@ -305,13 +481,24 @@ Rules:
 ====================
 
 ### STEP 4 — Assemble JSON (Schema A if still resolving, Schema B if final)
-- Schema A (resolving phase):
+
+- Schema A (resolving phase, always snake_case):
   {{
-    "parameters": {{ all snake_case keys }},
+    "parameters": {{
+      "compartment_id": string or null,
+      "subnet_id": string or null,
+      "availability_domain": string or null,
+      "image_id": string or null,
+      "shape": string or null,
+      "ocpus": number or null,
+      "memoryInGBs": number or null,
+      "display_name": string or null
+    }},
     "candidates": {{ only if ambiguity > 1 }},
     "ask": string (if still missing info)
   }}
-- Schema B (ready for creation):
+
+- Schema B (final payload, always camelCase):
   {{
     "compartmentId": string,
     "subnetId": string,
@@ -322,6 +509,25 @@ Rules:
     "shapeConfig": {{ "ocpus": number, "memoryInGBs": number }}
   }}
 
+⚠️ STRICT RULES:
+- Literal fields (ocpus, memoryInGBs, display_name) must appear only once:
+  - In Schema A → as top-level snake_case
+  - In Schema B → only inside `shapeConfig`
+
+⚠️ STRICT REQUIRED FIELDS:
+- The following fields must always be present in Schema B (never null, never omitted):
+  - compartmentId
+  - subnetId
+  - availabilityDomain
+  - imageId
+  - displayName
+  - shape
+  - shapeConfig {{ ocpus, memoryInGBs }}
+
+If any of these cannot be resolved yet, stay in Schema A (with nulls, candidates, or ask).
+Never generate Schema B until ALL required fields are present.
+=============
+
 ### STEP 5 — Output contract
 - Respond ONLY with one valid JSON object.
 - Never output markdown, comments, or explanations.
@@ -334,7 +540,6 @@ Rules:
 - Never mix both styles in the same JSON.  
 - If you are in Schema A, do NOT include camelCase keys like `compartmentId` or `shapeConfig`.  
 - If you are in Schema B, do NOT include snake_case keys like `compartment_id` or `display_name`.  
-
 """
 
 prompt = ChatPromptTemplate.from_messages([
@@ -349,7 +554,7 @@ client = MultiServerMCPClient(
     {
         "oci-ops": {
             "command": sys.executable,
-            "args": ["server_mcp.py"],
+            "args": ["server_mcp2.py"],
             "transport": "stdio",
             "env": {
                 "PATH": os.environ.get("PATH", "") + os.pathsep + os.path.expanduser("~/.local/bin"),
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